I haven't had the weedy problem with Freesia (Laperousia) laxa.. It self sows fairly freely, but is is small and scattered in my garden. Seem to remember it acting the same at Filoli... Perhaps your soil is richer and not as dry as mine, Carl?
Rob, I've got some Brodiaea in the garden that blooms in the summer. It's a native to California and has a nice display of blue flowers.
Scilla peruviana is another one that I've grown for a long time.. Normally deep blue, there's also a white form (which I grow). I've got mine in part shade.
Another prolific one is Ipheon.. Sky blue flowers.. The gophers seem to leave them alone.
There are some Amarcrinum hybrids (Amaryllis x Crinum)
I tried some of the more exotic bulbs when I lived in Los Altos without a great deal of success.. I think things like Eremurus and Fritillaria need more winter chill than the Bay Area offers.
Voodoo lily (Dracunculus) is creepy and smelly, but also very dramatic and cool..
My crocus and Iris reticulata have either pooped out, or the gophers ate them..
I almost forgot Leucojum.. one of my favorites!