ToMI Treasure Hunt page
 

Is it just me, or are some of the prizes for the Treasure Hunt duplicates? I swear that I've gotten three pairs of duplicate prizes; one pair was the avatars, and the other two pairs were $1 off coupons.

(Shame on me if someone brought it up already, because I didn't search beforehand :))

The duplicates are due to the fact that 6 of the ten prizes were for PC users, the other 4 for Wii users.
There is a 37 page thread that is chock-full of details, questions, speculations,... about the treasure hunt.
This post tells you what all the original prizes were (the $1 off coupons used to be much more lucrative until they decreased in value at the end of 2009).

Ooh, you're right. That's what I get for being late to the game.