Pumpkin Pollination Resources
Good morning, Pumpkinstas!
The most recent issue of California Agriculture (July-September 2009) magazine, http://californiaagriculture.ucanr.org/ has a fascinating article titled "Native bees are a rich natural resource in urban California gardens". This article is invaluable for giant pumpkin growers who are curious about bee pollination, and how to attract native bees.
The article also includes some additonal resources that I think you will find very helpful:
North American Pollinator Protection Campaign: http://www.pollinator.org/
Urban Bee Gardens: http://nature.berkeley.edu/urbanbeegardens
The Xerces Society for Invertebrate Conservation: