http://www.sixapart.com/movabletype/news/2007/06/movable-type-4-beta.html
Movable Type 4 will be GPL’d, right about the time no-one uses Perl anymore. Once upon a time I tried Movable Type (I even contributed a small patch), but the fact that it wasn’t free was a deal breaker for some reason. (It’s not like I don’t use commercial software.)