Why is this Yahoo! Group called XPArchaeology?

This Yahoo! Group was first designed for ex-members of the old Prodigy Archaeology Bulletin Board. Prodigy was commonly abbreviated "*P" or "P*" hence ex-P* or simply XP. Okay, admittedly it's not a very clever name, but it's short and has a nice sound to it.

The name has nothing to do with the Microsoft operating system, Windows XP, the name of which was announced some time after this group was formed. I've half expected a note from Microsoft's legal department (these guys are as possessive as Disney), but perhaps the group is too small to be noticed.