We have YTNR here in SoCal. You can PM Capt Noonie, Adi-and-Missy, or check out the YTNR site for information. Both of the girls I mentioned have fostered and know who to contact, and both are local... ish.
I'm actually 90057, so I'm in LA, but not a foster mom yet. I don't have the landlord's permission or the space.
There is an application you need to fill out. It helps weed out those who are serious from those who just want to do it on a whim I suppose. Here's the link:
http://www.yorkierescue.com/app.html