Follow the Narrow Path, and followed the links she had back to the original blog here.
Basically it's a really neat way to prepare for Thanksgiving. Basically you make a list of 30 people who have blessed you in some way. Then you go down your list mailing (snail mail, e-mail - whatever) them a thank you - one for each 30 days prior to Thanksgiving. This challenge started on the 24 of October so I'll be doing a bit of catch-up myself.
I don't plan on sharing too much of my list - at this point - we'll see how it all turns out, but I really love how this challenge sounds & I think it's an awesome idea!