Yea typically the 40 to 50 year mortgages are out in Cali, and there have actually been a few here recently... Nothing that I would suggest, no way no how...
A 30 or 15 year fixed might be the best way to go right now, with the bubble in a "buyers" market you are better off getting a fixed rate... if you go with a variable rate then in all likelihood they will extend to you good terms now and it will be fixed for a pre-disclosed amount of time and it will then become variable changing as the time goes by.. this is also mentioned in the contract, but they are more likely to give you a good rate now, knowing that the rates will change in their favor and they can make up the money from you in the future...
but as everybody has said, do your research, know your limitations and if you can pay the thing down asap....