Apple has seeded the seventh beta of Mac OS X 10.6.7 to developers for testing. The latest build has no known issues and Apple is asking developers to focus on Safari, Mac App Store, AirPort, Bonjour, SMB, and Graphics Drivers.
Though Mac OS X 10.6.7 will provide some much-needed updates and enhancements for current features and applications, no new features are expected to be unveiled. Instead, Mac OS X 10.7 Lion will likely be the only source of new features moving forward.
However, no information for the general public release date for Mac OS X 10.6.7 by Apple yet.