I'm finishing the windows version for 1.45 before returning to osx development. I have a pre alpha osx vst plugin that at least runs without crashing. Still missing important functionality (no scalable waveforms, big part of the gui is non responsive) because I still haven't translated some platform specific code.
I too am looking to add a MacBook Pro to my set up, well actually replace it with the Mac Book Pro actually. I bought and love LiveSlice for Windows, and I would be willing to pay an upgrade fee to get the OS X version. Is there any news on the progress that has been made?