Rumor: Mac OS X 10.6 in WWDC?

According to The Unofficial Apple Weblog, Apple may provide early copies of Mac OS X 10.6 at next week's WWDC.

Mac OS X 10.6 will run on Intel Macs only, and so will mark the death of PowerPC Macs :-(

Mac OS X 10.5, which Apple originally said would release at the end of 2006 or early 2007, was delayed until October 2007, debuting 30 months after its predecessor, Mac OS X 10.4. That version, however, launched just 18 months after the previous OS. The average time between Mac OS X upgrades has been close to 16 months, which means we can expect OS X 10.6 to be launched no earlier than Q1 2009.