As for RA's question RE: Using a PC's background info in a game. Generally, I think PC's backgrounds should be fodder for DMs. Inherently, a player controls one character. The rest is up to the DM. In some cases Players may mark things in their background as private. They should have a good reason for this. Generally, having DMs incorporate PC backgrounds into adventures makes it more fun for everyone, and makes the world more interconnected.
My PC, Percy, does have some private parts to her background. This is for what I would consider a good reason, in that I'm running a series of adventures myself that deal w/some of the NPCs and places in her background. But if other DMs want to use the Public parts, & one already has to some extent, then I'd be thrilled.