That forum thread lead me to the antidote, 12 reasons to ignore the naysyers: DO NaNoWriMo.
Reading the comments on both pieces could take the better part of a day, which is time better spent writing. One comment on the Salon piece really made me laugh. The commenter was agreeing with the author's premise that NaNoWriMo is a waste of time, because one year some friends of hers did it and thus were unavailable to socialize with her during November. Poor neglected one, eh? I love people who make everything all about them.
In any case, I will carry on. I haven't done a bit of writing today, preferring to work on a wall quilt side by side with my daughter, rake leaves, supervise cookie baking, and other homey sorts of things. I also received in the mail today a book I'd been wanting for a while and finally had reason to buy: Arthur Ransome & Captain Flint's Trunk, which is all about the real people and locations behind Swallows and Amazons. Surely this will help with the needed inspiration!