What regulations are in place for Bitcoin in California? I'm looking for information on Bitcoin regulation for companies.

Since Bitcoin is commodity, if you are a company and selling bitcoins you need to have license.

What are the licenses and regulators working with them? I am interested in creating a company that sells bitcoins to consumers.
There's actually a lot going on in the California state legislature regarding virtual currency regulation, and you may soon need a specific license from them (although the bill in question---AB1326---still needs to pass). You can read a little more about it here from CoinCenter.

Until that particular bill passes, it's a bit of a gray area, but it would be prudent to consider the guidance from FinCEN released two years ago.