Agave may survive your winters if you cover them during the coldest (freezing) days. We grow agave in Bolinas, if interested let me know and we can schedule a visit to the succulent gardens.

I would love that! I just ripped out plants in front of a rock wall and really want succulents.

We recommend you go to http://www.thedrygardennursery.com/ over in Oakland. Tell them David Schwartz sent you :)