There's a rumor circulating that Apple may either demo or release to developers a build of Mac OS 10.6 that's fully 64-bit clean and Intel-only. "10.6 will not include any new significant features from 10.5; instead, Apple is focusing solely on "stability and security" writes TUAW.
10.6 is rumored to go gold master (GM) by December 2008 for release in January 2009 at Macworld Expo.
TUAW brings up a good point, what will developers do? Will they continue to develop "universal" versions of their applications, or will they follow Apple's lead and leave PowerPC owners in the dark?
Also, what will the code name be? Apple has trademarked Lynx and Cougar, which one will it be?