WinXP = Win2k.
Pros and cons to both.
@Erik: Yeah, I want a dedicated linux box, running a web server and FTP server.
As I said, businesses use PCs over Macs because they can keep their 20 year old green + black accounting software and database because it runs on windows XP. Not to mention any special hardware or other software, blahblahblah.
It's called TCO (Total Cost of Ownership). Plus, most of your employees will have PCs, so you'd have to train them, etc.