An OS X binary does indeed exist, but it's out of date and buggy. We need Steff's latest revision of Noggit SDL in order to compile a new OS X binary.
In the mean time, you can run the Windows version with in a WINE bottle (created with Wineskin Winery) or in a virtual machine with Parallels or VMWare. Performance is degraded for these, however.
I'll see if I can create an up-to-date WINE bundled version. We really, really need a native build, though.