Matt B., a CAMRA member, organizes a bulk grain buy roughly twice a year. He usually posts both here on the CAMRA board and on Homebrewtalk.com. Unfortunately, it looks like he just organized one in the beginning of November and it filled fast, in 11 days!!! That's impressively fast.
http://www.homebrewtalk.com/f174/va-group-bulk-grain-buy-4-a-278153/Splitting 55lb sacks of specialty grain into amounts suitable for homebrewers would be a pain. I mean, how much crystal 60L are you going to use in 6 months-1 year? Just buy it from Fermentation Trap or Fifth Season and support the local businesses.