Just last week I finished signing my kids up for camp. I had one open week for my daughter and she kept vetoing every option! Finally found one she agreed on. Whew!
With the economy the way it is, there are still openings at camp this summer, and many are offering discounts. I know, you'll kick yourself to see that the camp you signed up for is now 50% off, but if you delayed, maybe you'll now be happy!
SFKids.org - has a list of camps you can search by type.
Signupforcamp.com has a list of camp discounts being offered now - it's on their blog.
And one Frisco Kids reader said that her kids' soccer camp in Santa Clara is 50% off for some weeks. Check it out here. The camp is as low as $25 for a week of 1.5 hour camps, though a variety of hours/ages/South bay locations is offered.
As an aside, many of the deal sites are offering discounted camps as well. Currently the only one I found is Plum District Deals, which has a circus camp in San Francisco at 31% off. Keep your eyes out, though. I don't usually post many camp deals from the deal sites. Doodledeals.com has a list of 5 camps with up to 51% off right now.