Couple weeks ago Reuters reported that Apple thinks about switching to Intel, away from IBM. Now CNet reports that Steve Jobs most likely will announce a phased transition to Intel CPUs starting 2006 on Monday at the Apple Developer Conference in San Francisco.

As the information appears on CNet and not on a Apple rumor blog, it is most likely true.
This move would of course further help the Intel PC market domination. Intel currently holds 81.7% of PC CPU market share. If there is an Intel CPU inside a Mac, then we maybe will see native Windows on Macs.
More details on CNet.