Do you remember when OLPC started and Bill Gates said that folks should "get a real laptop" instead of the XO-1. Well at the time, OLPC had what no one else could offer - a sub-$200 computer that was portable and functional.
While it could not run Windows Vista, it did run Windows XP, after a bit of Microsoft hacking.
Now, a few years later you can get a real laptop - or what Bill Gates would define as "real", i.e. a laptop that runs an unaltered Windows operating system. Behold the $230 Asus Eee PC 1001PXD.
And unlike the XO-1 (still!), you can buy one or a hundred new Eee PC's with just the click of a mouse. Oddly, though, you cannot buy a Linux version of the Eee PC 1001.