Windows 32bit Family XP RTM - 5.1.2600
XP SP1a - 1106
XP SP2 - 2180
Server 2003 RTM - 5.2.3790
Server 2003 SP1 - 1830
Server 2003 SP2 - 3959
Vista RTM - 6000.16386
Server 2008 Beta 3 - 6001.16510
Windows 64bit Family XP 64bit RTM - 5.2.3790.1830
XP 64bit SP2 - 3959
Server 2003 64bit RTM - 5.2.3790.1830
Server 2003 64bit SP2 - 3959
Vista 64bit RTM - 6000.16386
Server 2008 64bit Beta 3 - 6001.16510
While everyone focuses on the iPhone next update, a new rumor posits that Apple will already have a new version of Mac OS X available for testing in early form at WWDC, with its actual launch appearing as early as next year's Macworld event.
Information purportedly handed to TUAW would have Apple seeding a rough version of Mac OS X 10.6 to developers attending the conference, with a release to manufacturing in December and a January shipping timeframe.
Similar to Mac OS X 10.1, however, the release would more closely resemble a maintenance release than a complete overhaul. The primary change would be a complete transition to an Intel-only, 64-bit platform that drops PowerPC support, pushing developers to code only for the x86 architecture at the heart of all Macs released from 2006 onwards.