MacJournal 3.x went Universal just last month, but
Dan Schimpf, its developer, has made a 4.0 beta available on the MacJournal
Development Blog. The list of changes, updates and fixes in 4.0 is long, as Dan talks about in-depth in this entry, but the biggest new features by far
sounds like a major face lift to MacJournal's blogging abilities. Lots of new support is being added or rewritten for
blogging protocols like MetaWeblog (for WordPress and MovableType) and Atom (for Blogger).
Other new features include a revamped Inspector, lots of full screen mode enhancements, importing text clippings and much more. Check out the progress on the blog, and it sounds like if you own a 3.x license, you can play with the 4.0 beta free of charge until it goes official.