There's plenty of comment around on the Movable Type developer launch and the license changes, so there's no need to repeat it here. If you want to gauge the reaction, have a look through the trackback entries on the announcement about pricing at Mena's Corner.

It's nice to see that trackback is working as intended - gathering the discussion about a topic. It's a shame that much of the reaction is negative

Simon worries that our marketing friends might stomp on blogging as a result:

I do hope my colleagues in marketing don't find out because there could be some pretty tricky questions to answer about using this medium for business.

But this isn't really a problem that is specific to blogging or trackback - any forum that allows customers to comment on your announcements in an un-moderated fashion will produce similar results if you host the comments on a company site (it seems that Sun's BigAdmin might suffer abuse in much the same way).