In Massachusetts there is an excellent resource, as you mention.
Sonia Schloemann publishes an email newsletter called "New England Grape Notes" on all kinds of topics from disease control to weather. She cites the information is collected by Arthur Tuttle, Dan Cooley, Hilary Sandler, Bill Coli and students from the University of Massachusetts and Richard Kiyomoto from the University of Connecticut.
"We also acknowledge the excellent resources of Michigan State University, Cornell Cooperative Extension of Suffolk County, and the University of Vermont Cold Climate Viticulture Program. See the links below for additional seasonal reports:
University of Vermont's Cold Climate Grape Growers' Newsletter
UConn Grape IPM Scouting Report
Support for this work comes from UMass Extension, the UMass Agricultural Experiment Station, University of Connecticut Cooperative Extension, USDA-CSREES.
FYI - check out the newly formed Massachusetts Farm Winery and Growers Association and New Hampshire Winery Association and the Vermont Grape and Wine Council. These associations are of, by and for you! Join today!!
For Massachusetts residents, check out the new Massachusetts "Ag Tag" license plate. Each purchase can yield $15 for the Massachusetts Farm Winery and Grower's Association through a check-off plus pooled funds available for various programs or competitive grants.
Newsletters are here:http://www.newenglandwinegrapes.org/index.php/news-and-events/newsletter
p.s. CT has the CT Winery and Vineyard Assn too.