A program by David Suzuki recently aired on CBC January 7th entitled To Bee or Not to Bee. The documentary explores various possibilities for the declining honeybee population in several countries such as industrial beekeeping, poor nutrition from monoculture pollinations, and diseases.
The topics are similar to another documentary The Vanishing of the Bees.
It was released in the UK in October 2009 and is scheduled for US and international theatrical release in March, April and May. At this point the film is being screened at smaller venues in the states and the next showing is in New York in February.
The trailer for the film is available on youtube and you can sign up for mailing list updates on their website and follow release dates near you.