Since apparently a lot of people don't realized there have been more recent builds made then what's on the Download page of their website, I thought I'd post here. Pretty regularly people post new builds to their Mac forum. I just posted one here: http://forum.qavimator.org/viewtopic.php?p=1561 from SVN as of yesterday (it's built for both Intel and PPC though I've only tested on Intel).
One caveat, if you have the QT4 libraries installed on your system (from the DMG that Trolltech provides) then this won't start. (It ends up loading the Qt libraries twice and things go downhill from there. =p) To get it to work you need to move /Library/Frameworks/Qt* somewhere else.
~ Winter
PS: "Automatically parse links in text" adds "url" tags but they aren't actually support? Seriously? That's really beyond lame.