Definitely not a "supported host" by any means, but Maschine 1.6 beta just came out and I thought, why not try it out?
On a Mac with 10.6 the VC works great in 64-bit and 32-bit mode. I only used the AU version of the plugin, but Maschine does let you use your VSTs and your AUs like, say, Ableton does.
Works flawlessly. Obviously a simple host like Maschine doesn't support delay compensation (probably never will) so just set your buffer really low and put the VC in Live mode, and everything is very playable.