As for adding RAM, I think most netbooks have a small RAM plate at the bottom (only 1 screw to undo and you can swap out the RAM, as far as I've seen) and it won't void the warranty.
I went ahead and got a 1005HA for pretty cheap, and I'm using it right now! Great device, and I'm happy with what I've played around with so far! Works exactly as I expected. Thanks for all the recommendations. I was tempted to go after one of the HP 11.6" ones, but then in the end I thought 10.1" would be a better size for me. The battery seems to be great, and I'm considering swapping out the wireless card so I can get Hackintosh running on this thing. Just a thought.