as far as compatibility...
Hey, I got a 12" PB that works very well (I'm 5'10" with no "screen size" problems

), I'd always been a PC user, but switched (like everyone else) within a few tries of OSX. My brother works in journalism in India, my parents have businesses in the states, I do journalism in Eastern Europe. We all used PC's. I switched first, of course worrying about compatibility, but have never had an issue (believe me, there are no Mac users in the Baltics that I've ever run across). My brother claims the same thing: he rarely, if ever, comes across a mac user but still has no compatibility problems. My parents haven't switched yet, but they are opening a new business that will use macs. I guess what I'm trying to say is, don't worry about compatibility on any sort of business end. I share documents and connect to servers, I travel the web with little fear of viruses (honestly, I don't fear viruses at all as I've never heard of a mac users getting a debilitating virus, but I can't say mac's are error proof). My system has never crashed (sure, I've only had it for four months, but still...). This little PB is a beauty. My biggest worry is having it stolen.
Maybe if you're a gamer you'll have compatability issues. Even there though, I've got Halo and multiplayer works with the PC. I'm sure future games will also incorporate this feature as the mac world is growing.
Maybe this helps...
maikutis