MacRumors.com

ThinkSecret reports that Mac OS X 10.5 (Leopard) will ship in June 2007. This would bring it just within Apple's official "Spring 2007" release date.

The rumor site hints that Leopard will indeed include some surprises, but no details are available:

"Leopard is shaping up to be a more significant release than anyone expected, with much more to come than any of the developer builds have led on," one source said.

Updates to iLife and iWork are also expected alongside Mac OS X 10.5 (Leopard) but that they may be rebranded as "iLife Leopard" and "iWork Leopard", dropping the calendar-year naming convention of the previous versions.