Well, as Bill Gates seems to think that piracy is OK (see
this thread) I no longer have any hangups about admitting I use pirate software.
I have XP on one of my machines so that I can use Office 2003 and recieved the Genuine Advantage thing about a month ago. However, after doing a quick Google, I found a removal tool immediately and was able to get rid of it. I'm at work now so I can't tell you what the tool is called, but I'll have a look this evening.