Picadilly Farm (in Winchester, NH, just over the line from MA) is offering a late season CSA again this year. For $140, you get four LARGE (1 1/9 bushel) boxes of produce - two per month in November and December. We did this last year and have just signed up again for this year. The shares include a variety of storage crops like squash and root vegetables, but also cold hardy greens until the first snow (last year, this meant we got a load of greens in both November boxes). They offer pick-up options at the farm, at Bart's Cafe in Greenfield, and at The Works in Keene, NH.
See the farm's website for details and a sign-up form.