Climbing at Yosemite

[LostFarmboy]

Ok, so i'm moving to the big U.S of A at the end of the year (providing there are no problems with visa applications and finding a job) and I would really like to do a bit (ok, a lot) of climbing while i'm there. At the moment I'm leaning towards somewhere around the San Francisco area.

So, my question is, what's the climbing scene like around the San Fran area, particularly Yosemite National Park? I know Yosemite is famous for it's massive walls, but are there any smaller sport routes around the park? What type of climbing would I come across - crack, slab, etc? Is it mostly trad or sport routes? Is it majorly busy?

Any info would be geatly appreciated.

Cheers