I learned about the sport through this article: http://www.newmedia.com/default.asp?articleID=2347
Hands down I think it is a much nicer article than than the NY Times one. Since I have gotten involved with this I have also started Hiking/Backpacking/Camping. It has opened up a whole new past time for me. As for those thinking it's a waste of time to go up looking for a "bucket"...it's not what's in the geocache that matters...it's what's around it.
If this sport helps more people out there to appreciate the outdoors - it's worth it.