Basically, it's a database for finding PBs that could play relatives. ...Well, it hopes to be an awesome database for finding PBs that could be relatives. Members can post PBs they think could play siblings, aunts, children, grandparents, cousins, etc.; and there's a tagging system in place to make finding PBs as easy as possible.
Example: Your PB is Jenna Fischer, and you want to find someone to play her sister. You can browse the jenna fischer:sister tag to see suggestions.
It's kinda brand spankin' new -- there are only two posts at the moment! So I'm looking for awesome people like YOUS GUYS to head on over and post some suggestions! If I knew you in person, you'd get chocolate chip cookies... but as that's not the case you'll have to settle for my eternal gratitude :o.