Well, that was exciting. I wasn't sure what was happening with my sites, since Drupal throws up a maintenance page automatically when it can't get a database connection. My ISP is still investigating what caused the problems.
In the meantime, the WhatWG IRC log is interesting reading today, including the following quote about HTML5 and Last Call, from Philip:
AryehGregor: Hixie, are we still scheduled for October Last Call? Philip: If there's a delay, we can just redefine October to match the reality of the spec's status
So there you go, if someone asks whether HTML5 will make Last Call in the next few weeks, you can answer, Yes—secure in the knowledge that it's always October, somewhere.