Joseph:
Thanks for the kind words. Keep the ideas coming...

As you know, we don't discuss future products in a public forum, but I can say that I believe you'll like what we've got going in the next version...

For the record, I was against Randy's plan to release MSTT for free, but as time goes on, I see why he put so much emphasis on getting what we had already written out and in use. He, and now I, have tremendous faith in our users to tell us what they want to see in the next version.
Norman:
Glad to help in any way that I can! I did not mean to indicate that you cannot use a tablet in the field. It is just a matter of cost, though, as there are a few devices that have all-weather capabilities. That being said, there are also a few cases that might work for you which provide protection from "incidental" moisture. However, be aware that in extreme cold, hard drives and screens can have problems. Our Toughbooks have automatic heaters to warm the hard drives when the temp drops to about 35 degrees and the screens are built differently from most consumer-grade products... devices like this are meant to be reliable in a much wider range of environments than the ones designed for office temps and occasional weather. As you know, a true ruggedized device tends to cost more than the indoor types. Most stuff you see advertised doesn't even measure up to the "semi-rugged" devices, but for most people they can do fine if you just take care not to expose them to really harsh conditions.
Anyway, you might want to compare the name brands and their warranties, availability of drop protection and all that before you "go generic." There is a lot to be said for having a live body - i.e. a real person - to deal with, but sometimes, the small guy just can't compete in the cost/benefit ratio department. What I mean is to check prices and weigh things carefully. There are a few semi-rugged laptops out there that just might be worth the (small) extra price as they are designed to take a little rough and tumble, but aren't "hardened" to work for military/firefighter type duty. Heck, even the excellent X41 has stuff that protects the hard drive if the device is bumped or (say) thrown into the back seat. Plus, it has a pretty good "standard" screen - that is, it has an anti-glare treatment which works well... a lot of laptops have gone to the "glossy" type screen since that makes them look sexier when on the shelves next to their competitors in a store. While you may not take this laptop out of the car while inspecting, being in the car, your assistant will still have to deal with sunlight conditions. Plus, the X41 is a tablet PC, so you COULD take it with you on the inspection when weather permits... Think about it.
As far as basic "specs" for a notebook/tablet, what we are hearing from our customers that a 20GB drive is about the minimum and what we're seeing from their ordering patterns (and also from feedback after the sale), there is usually a "sweet spot" - i.e. the 30GB option is something like a $79 upgrade at time of order, where the 40GB drive is (say) $350. Exactly how much HDD space you "need" is largely determined by whether this machine will be used as a "main machine" or more of a Mobile/occasional use" machine. I would think that, using the aforementioned example, the 30GB choice is the BB4TB choice. I am always a bit surprised when people pay a lot of money to max out a machine when it is not necessary, yet complain about a $100 software upgrade... Doesn't seem to make sense to me. On RAM, generally we are seeing that the BB4TB is between 512MB and 768MB/1GB... Once you go above 1GB, the price tends to skyrocket. Some software programs need more RAM, but I think you'll find that 512MB should do it, but most of us recommend the 768MB-1GB range, just to be safe. Don't get too worried about the "processor speed" - a good Centrino certified laptop is faster that you might think when comparing older desktop systems. For example, we benchmarked a 1.6GHz Centrino Tablet PC against a 2.8GHz desktop a year ago. The Tablet was new, the desktop about 1.5 years old. The Tablet blew away the desktop is all areas except HDD access time - laptop drives are slower than most desktop machines. But, the overall "seat of the pants" feel was that the laptop was faster than the desktop. It is not the simple CPU GHz rating that is the most important - it is HOW all the components work TOGETHER. When you see a machine that has the Centrino badge, it is not referring to the CPU, it is referring to the fact that the individual components of the computer have met the spec to earn the Centrino badge. That is, they work together properly and you get a faster feeling system that also doesn't eat up the battery as fast. Anyway, the speed of the CPU isn't all that important, so if you like a system that has a 1.2GHz processor with a Centrino rating, it is probably a better choice than 1 2.0GHz system that does not have a Centrino rating. On screens, just remember that bigger is not always better. Look at the screen resolution. A 12" screen at 1024 x 768 will be MUCH easier to read (especially out of the sterile office) than (say) a 14" screen at 1600x1050 or similar. Plus, most Tablets use a 1024x768 resolution as the "standard" - the ones with larger screens and higher resolutions are generally more "desktop replacement" type machines and are very heavy by comparison.
On the Pocket PC, we recommend the HP hx4700 or hx4705 as our hands down favorite device.
On the wireless question, we recommend devices with Bluetooth so that you can use them with a DISTO Plus, wireless headsets and the like. Though this is not a requirement, it's nice to have it IF you decide to use it at some point. Usually, Bluetooth is either built in or a very low cost option. On the WiFi thing, a lot of people seem to really think this is a "must have" as they use it to connect with their network back at the office/home vs. a wired network connection. IF your machine has a "docking station", then it's not such a big deal - it's just really more of a "convenience" thing. WiFi is slower than a wired connection, but is IS convenient. Also, please be aware that both Bluetooth and WiFi are "radios", and when they are on, it uses additional power. WiFi is much more power hungry that Bluetooth. Randy tells us that the next Bluetooth (v2.x, out now) is faster AND more miserly on power usage. The WiFi stuff out now is relatively short range - i.e. in hundreds of feet at best, so don't think that if you have WiFi, you'll be able to connect to something like you can with a cell phone. THAT type of WiFi IS coming, but we won't see it in common use for another couple of years.
Hope this helps!