MOTU has released a public beta version of MachFive (v1.2.2).

This update provides Tiger compatibility for the following plug-in formats: MAS, AU and VST, and is backward compatible with all versions of Mac OS X back to Jaguar (10.2.x). MachFive Tiger compatibility for RTAS and HTDM is expected to ship concurrently with the Tiger-compatible release of Pro Tools later this Spring.

Attention Logic users: MachFive v1.2.2 public beta is not yet compatible with Logic 7.0.1 under Tiger; this is expected to be resolved shortly. The AU version of MachFive v1.2.2 public beta appears to be compatible with Live, Garage Band and other AU hosts.