From Anthem Blue Cross December 2010:
Initial 12-Month Rate Guarantee (For IFP ONLY!)
12-month (new business) rate guarantee on and after 3/1/2010.
Anthem will also honor the rate guarantee for any members still in their initial 12 months of coverage on and after 3/1/2010. Following the initial 12-month rate guarantee, although they will continue to adjust rates every 12 months, they may adjust more frequently.
Looks like a good time to sign with Anthem!