My laptop was due for replacement, so about five weeks ago I got one of the $400 HP Netbooks from Best Buy.
The idea of a Netbook sounds pretty lame, but mine is such a complete replacement for a normal laptop, that I dropped its predecessor off at the local charity and didn't look back. I like carrying around less than one third the weight and volume.
This one has XP, a 10" screen, 16GB solid state drive, 1 meg system memory, and a 3 cell battery. It also came with a 2 GB deep socket SD card to give some extra memory. There is no optical drive, so unless you already have an external USB or firewire drive, that will be an additional expense.
I am NOT a power user. I use word processing, quicken, and the internet, and that's about it. My 16 GB SSD still has at least 10 GB free. The Atom processor is weak, and a power user would likely be disappointed.
I have a program for my PDA phone that turns it into an ad hoc wifi hotspot, and I am posting this from the Netbook through the PDA phone.