I brought this up to one of the girls on the 1st trimester board and thought I'd bring it up here too. A lot of Ultrasound schools offer free ultrasounds from the students, I went to one today and while he was a little inexperienced and the machine was pretty crappy I got to see my baby and had a lot of time to ask him questions that I normally feel too rushed to ask at my Dr appointments.
I found it by googling "free ultrasound Sacramento" and by looking on Craigslist community. Just make sure they're at a school or office and not someone's basement Great for women without insurance. Good luck ladies!