I just noticed the TypePad problem and will be approving comments caught in the spam filter, then deleting duplicates. There are currently about 80 comments in the filter, but a lot of these are multiple attempts (and none are actual spam). This is annoying - apologies.
[Please leave comments as always, and if it's caught in the filter (most aren't), I will approve it as soon as possible. Once I catch it - and I'll try to check often - it doesn't take long to move it out of the spam list.]
Update: See Moon of Alabama's "TypePad Sucks" for more on this. Update: Barry Ritholtz is also having problems. Update: TypePad tells me they've tweaked the filter and it ought to be better now.