real estate map searches

Real Estate Search Site in the Bay of San Francisco?

I'm in the market for a house in South San Francisco Bay or the Peninsula and the few websites I've tried are good but not great (realtor.com, trulia.com, redfin.com, windermere.com, mlslistings.com). None of them have a 100% announcements, including the sale by the owner or REO listings, or too difficult to search (without visualization of a global map of the area). It would be great if had a really good site that aggregates all the lists as possible, with a view good map, a detailed search filter, and the latest lists. Can anyone provide recommendations? Thanks

The biggest problem is the Bay Area has multiple MLS services. Stupid idea, but there it is. You must have access to the MLS for the detail you want, and even then is difficult because the only place to combine does not work very well.

Braintree Massachusetts (MA) Real Estate Tour