FabFilter has released the VST version of FabFilter One for Mac OS X, in the addition to the existing Audio Units version. It costs US$59 and a demo version is available.
Also, FabFilter is currently finishing its next product, FabFilter Volcano, an extensive filter effect plug-in building on the filter technology developed for FabFilter One. The release is planned for Spring 2005.
Find One and Volcano 3 in the KVR Marketplace