hudson valley seed library: http://www.seedlibrary.org
i like that they only sell things that will grow in their climate, which is the same as mine (and yours, too, yeah?). so i know i won't get overly excited about something that's not going to grow that great in new england.
i've also gotten things from seed savers exchange: http://www.seedsavers.org
potatoes, carrots, beets, and some radishes. things that i know will grow here.