To all you Athlon 64 users:

[xtknight]

There needs to be a both option. But I voted x64.

 

[ProviaFan]

I ran XP64 for a few months, but ultimately switched back to XP32 last week due to lack of drivers for my color management system and iPAQ. While the coolness factor isn't there, I don't miss the compatibility issues at all. Vista 64 will probably be the point at which I switch, though it remains to be seen how manufacturers will handle driver upgrades for Vista...