It has been hard to find decent ISP related services in the Bay Area -- Here is a short list of some of the better facilities I have worked with or visited. They each provide a plethora of services from cage space, partial racks, 1 mb/s to 10 gb/s. Some have peering and/or are carrier neutral. If you have any questions or need assistance finding space for your company, contact me and I can provide plenty of advice.

List of "neat" datacenters:

          365 Main
          200 Paul
          Market Post Tower
          Jupiter Hosting
          Simpli.biz
          Bay Area Internet (BAIS)
          Palo Alto Internet Exchange (PAIX)
          Equinox (because of the peering and neat atmosphere)
          Hurricane Electric
          InReach Internet

          And more -- arrange me a tour, and if I like your place, I'll add your name to the list
         

Unrecommended "datacenters"
          555 Howard (now out of business)
          SFColo
          United Layer