Or is it...
...flea bit?
😆
You'll like Windows 7. I've been using it for maybe a year and it's pretty stable. It retains some of the best features of Vista (ReadyBoost, for example) and introduces some nice new touches. And IE9 looks like it'll be a pretty good browser.
A 64 bit system isn't strictly required for world domination, but of course with a 32 bit machine it'll take you twice as long.