We here at Qt Software are busy working on all sorts of stuff. Things are moving forward though. For example, I took the plunge and integrated the Cocoa port into the "main" branch over the weekend. It's a massive undertaking to do a submit that touches many files and get everything working. In the end, it was only something in the UNIX print dialog that didn't take (probably because of a bad merge from a while back).
Anyway, it's in main now and should be part of the snapshots. Run configure -help to find out how to turn it on since its not the default.
Otherwise, I'm working on my presentations for DevDays. If you are looking for a chance to corner me and talk about the Cocoa port, you'd be hard pressed to find a better opportunity than at DevDays.