One more thing!
If you, or anyone in this thread, decide that you'd love to help, but can't quite commit to fostering a child full time, there are so many other great ways to help/ dip your toe in the water. Whether its volunteering for an organization like CASA (guardian ad litems), or finding foster parents in your community who need respite care once a month.
I know of grandparent-aged foster parents who really, really rely on volunteers and extended community to just give them a break on one or two Saturdays a month so they can recharge, spend time being grandparents for their biological children, etc. Likewise, we know a family whose teenager volunteers to be an informal "buddy" for a little boy living with foster parents as a way of giving the child an older, teen male role-model (and someone to ride bikes with and get dirty with). Things as simple as surrounding a foster placement family with extra meals in times of stress, taking the kids out for ice cream or on "normal" child excursions, etc. all make such a huge difference in helping the situation succeed. It also has the benefit of showing the child/ren what a supportive network looks and feels like.
Finally, if you haven't watched the show The Fosters on ABC, its super cute (if not a dramatized - think Parenthood meets the foster care system).