I'm not surprised with the uptime at all. My computer stays on pretty much all the time for p2p and other stuff. I frequently get uptimes of close to a month since the only reboots/shutdowns are when I update or when I leave the house for a few days. XP is very stable most of the time. The only frequent crashes I've ever experienced with XP have been hardware or driver issues. That's not to say the OS never crashes, but the number of non-hardware related crashes is less than one every 6 months.

Cheers,
cgkanchi