There's a New England hybrid gathering being planned here:
http://priuschat.com/forums/viewtopic.php?p=108943
There is a poll vote for the date, either Saturday July 30, 2005, or Saturday August 6, 2005. (Currently the Aug. 6 date is winning.)
Location is still to be decided (probably by Monday), but it looks to be in the Framingham/Natick MA area. Suggestions are welcome!