I have a Black ASUS 901 Atom 1.6Ghz 2GB Ram, 16GB Solid State HD (4 + 12), and a 16GB SHDC card for extra storage. I run WinXP SP3 and the thing boots up faster than my regular PC (about 30 seconds max). I can run Office 2003, games, and pretty much any app. You just need to be cautious of space.
The biggest benefit of this model (intel Atom ones) which is not always mentioned is the BATTERY LIFE. I can run 6-7 hours easy with Wifi turned on. Try that on a full laptop. MAKE SURE you get one with the new Intel ATOM processor and not the Celeron if you want loooooooong battery life. I even don't bother carrying the power pack and can use my laptop for a couple days. It's mobility in the truest sense.
It runs quiet and is extremely small. Most apps load alot faster on this compared to my PC (due to solid state HD) but writing can be slower, but not noticeable after a few easy tweaks.
I would suggest NOT getting the non-solid state version as they are not as shock proof (think about it, you're carrying it around everywhere), and unless you really plan on putting your movie collection on it, there is really no need.
There have been alot of operational problems with the Acer ones. compare them, ALOT more features but for less money??? hmmmmmm... The place where I got them told me there were alot of returns. But Acer could have improved by now.
Thanks to $5 for lifetime Wifi at Starbucks, I use it practically everywhere. Sometimes, when I need quick internet, I literally drive up beside the starbucks, login, do what I need to do for a few minutes and leave. Don't even need to go in and buy a coffee, lol.