I know of a website that is having a Scavenger Hunt for the game, Animal Crossing: Wild World. It's gonna be a HUGE hunt spanning multiple towns. Right now we're trying to get as many participants as possible, so we can make the hunt even better.
So... if your interested, or if you just want to see more info, join International Friend Code Alliance, also known as IFCA.
Here is a link to the website:
http://ifca.forumer.com
And BTW, there WILL be prizes......