All their other feeds are working fine. It's just the Pats.
As in the other sports, they have two feeds - one for just Pats and one for the NFL/general. The NFL/general one is working, but hasn't been updated either. The Patriots one they link on every Pats page doesn't work at all. I e-mailed FeedBurner about it awhile ago and they gave me this link instead:
http://feeds.feedburner.com/bostonherald/football/patriots
And of course, that one hasn't been updated either.