> I would love to try this client but I don't have a Mac. Anyone know
> how to emulate Mac OS under Linux so I can try this?

Technically yes: VMWare can create a virtual machine and at  
www.osx86project.org are some answers on how to install OS X on it,  
but i (and apples layers) wouldn't recommend it. In theory it could  
be compiled on Linux too. The nextstep frameworks are open source, i  
would probably need to rewrite mayor parts using only the  
constructions available in that frame work...

I'll leave that as an excercise :-)