That's truly bizarre. The error message Jesse quoted is exactly what I'd been seeing of late. And at one point the whole piece had disappeared from the website.
Then last night, presumably fueled by Scotch and beer, it showed up. Confirmation email received.
This is not to say it won't result in an email from SWS.com's crack smokin' monkey saying oops, we forgot to turn that off last night
But I can hope and at worst I get nothing, what I deserve for dragging my ass. The consolation is that SWS.com's reputation for screwing things up will continue to be solid as a rock.
edit: just took a wander over to the site and it's absolutely gone again. Maybe I just caught a cancelled order or they found some more in the back