Apple has seeded the latest version of their 10.6.4 release to developers for beta testing. The new release has improvements for VoiceOver* for iLife, and also USB, VPB and Graphic card performance.
With the releases of 10.6.4 beta’s being more concise, we can expect to see a public release soon.
*VoiceOver is one of the many built-in features to OS X to help people with disabilities. For more details click here
