LimeWire 1.7 beta is currently available at:

http://www.limewire.com/index.jsp/download_beta

We will likely be moving this to the official release quite soon, so the current release is quite stable.

We have put a lot of effort into the Mac version for LimeWire 1.7, and we have solved several important Mac bugs. The dreaded "freezing" bug that many people have been experiencing should have been solved, although you may experience some freezing when LimeWire initially starts.