The domain they let expire (but then renewed after a brief lapse) was washpost.com, which they were using for e-mail. Their Web site is under washingtonpost.com. I don't know why they set their stuff up with such an inconsistency, requiring the maintenance of two different domain registrations instead of logically using everything under one as I've always advocated (in all my rants against "Stupid Unnecessary Domain Names [tm]"). In addition to the logical structural issues, there's that the more domains you (unnecessarily) register and use, the more you've got to keep track of and worry about accidentally lapsing, like this one.