update: blogger h4x0r3d!
Blogger has apparently been hacked, so posting is no longer possible. I have not been able to log on to see what damage, if any, has been done to my account, but in the meantime I'm putting up this manual post.
Related info at:
BoingBoing (no permalink)
Updates as they occur and are possible to post.
And yes, this is even further inducement to migrate to Movable Type.
Update: The problem appears to be fixed, and posting is once again possible. I just transferred this manual post to Blogger.