A 2nd video of progress of the rewritten MailWasher is up here (if you want to make comments on Youtube).
There's lots of new features and enhancements so it's worth taking a look.
We'll be releasing a public beta limited to 1000 existing registered users early December.
We are aware the schedule has slipped, but we will release the completed version in the first quarter of 2010.
Some general information is here.