I'm also interning out in San Francisco from June to August/September, and looking for a place to stay. A friend out in SF recommended http://www.sfhomestay.com

I'm also interning out in San Francisco from June to August/September, and looking for a place to stay. A friend out in SF recommended http://www.sfhomestay.com/ http://www.sfhomestay.com/ to me. Padmapper looks pretty good though, and I'm going to spend some time checking that out now.