Moving to sf / palo alto for startup - advice?

Hello!

My team is finally making the jump from our full time jobs and planning to move to the bay area for a number of reasons. I've spent 2 summers in palo alto, so I'm somewhat familiar with the area but also wanted to hear you all's advice.

1) Where is most of the startup action? Events, 'startup-populated' coffee shops, investors, etc. SF side? PA side? Mountain View, etc?

2) Besides incubators for funding, are there any known programs to provide simple housing?

3) Are there any organizations that hook up startups with each other to rent out larger houses to save costs (5+ bedrooms, etc.)?

4) Any general tips on housing in the area?

Many thanks!