Beaujolais is actually a great wine for Thanksgiving, though it is probably more often than not chosen because of the brilliant marketing of the Beaujolais Nouveau.
Released with much fanfare the third Thursday of each November, Beaujolais Nouveau is billed as the first wine of the year, though that distinction no doubt lies with the folks in the southern hemisphere, who harvested in February.
Beaujolais Nouveau can be a fun wine; low in tannins, grapey and easy to drink. It is a nice choice for Thanksgiving, though there are better Beaujolais to choose from. A nice Cru Beaujolais from Moulin-à-Vent, for example, that combines sappy fruit with an easygoing style. 2009 is a spectacular vintage too, so this year might be the right year for Beaujolais!