Well, looks like I might have to run down to the Post Office after all. The TurboTax filing servers have not been working for hours. I thought that after midnight EST, things might calm down, but I don't know how long to waste before just printing out the forms and taking a trip into town.
Update: The answer turned out to have been "about an hour." Given that the whole point of e-filing is convenience, for which they charge you \\(34 (\\)17 for Fed, \$17 for State), there didn't seem to be any point in online drama. A big screwup on Intuit's part, but not enough to make me switch products. I have Quicken records going back years and TurboTax is actually a heckuva good piece of software.