An update to the Twitter rant. GigaOm picked it up, and in the comments you'll find a reply by Jesse Newland who says he'd created the Woot notifier for his own use and then turned it over to Woot when they asked. In case you were wondering, I don't have a problem with Twitter or Woot -- both are great services -- it's the idea of posting and reading about every mundane detail of someone's life that's disturbing (and making a big deal out of it, too). But Jesse raised a good point: apparently, Twitter is a great way to deliver RSS feeds through instant messaging and txt.
A few other similar services out there:
Instant Messenger as Content Delivery Platform