I'm doing lettuces right now, and getting ready for tomatoes, probably next weekend. I also just sowed seeds from a Persian sweet lemon from fruit from a friend's tree.
Last year I grew some tomatoes bred by Kanti Agarwal and Steve Peters of Seed Revolution Now - you can get a few of their varieties via
Adaptive seed in Oregon - and they were super successful.
Bred specifically for California with our dry climate and wide temperature swings from day to night (both things that tomatoes generally don't like), they're the best tomatoes I've grown here in the Bay Area.
I've also got rhubarb going! Mine have about 4 or 5 true leaves already. They're
"success"and "ebony" from French Harvest Rhubarb Seed in Australia. Germination was fast and easy. "Success" is the one Californians rave about - it can take more heat than typical for rhubarb and seems to be very vigorous. "Ebony" has beautiful dark stalks, and may or may not like my climate. But it was so pretty I decided to take a risk!