One night and two days at Disneyland/California Adventure Enough?

I'd go with 3 days. Depending on how busy the day is, a day for each park (although California Adventure is pretty small, not really much you can cram into an entire day) and the 3rd for just go arounds. I'm sure you'll be properly sick and tired of anything Disney but the 50th Anniversary Fireworks and Mainstreet Parade are worth seeing more than once. But of course, I enjoy a good parade, I don't know aobut other people.

Anahiem is pretty damn boring if you're only sequestered to the Disneyland part. Hell Orange County in general is pretty unexciting, it's too cold to go to the beaches and the only real passtime is shopping. Fashion Island in Newport Beach and South Coast Mall in Costa Mesa are excellent stopping points.

Jam it back in, in the dark.