I am in the process of making a new sc2 strategy fansite. It's a pretty ambitious project with really good features that'll distinguish itself. How do I register to become an official fansite or affiliate? Also, what is the policy or providing beta keys to fansites? I already have 2 keys, but I will need beta testers to help me with documentation. I am not doing this to try to get free beta keys, and I'll unveil the site once I have something up and running. Thanks.

For EU fansites, you can use the following webform:

http://eu.blizzard.com/rtswebform/rts.html

If I see a US fansite sign up there, I can pass it along. We don't have the RTS fansite program as fleshed out as we would like it to be, so don't worry if you don't hear back from us. We are keeping tabs on all sites that are signed up there and checking in on them quite regularily. If we have any opportunities we will get in contact with you.
We will hopefully get something a bit more permanent up before launch, including also a list of fansites on the website. Until then, we really appreciate all the work all the fansite staff has put into their sites. :)