Intel iMac (Rumored)
From Mac Guides
The Intel iMac has since been released so this article remains for historical purposes only.
According to the earliest rumors, Apple plans to move "lower-end computers such as the Mac mini to Intel chips in mid-2006 and higher-end models such as the Power Mac in mid-2007. At WWDC 2005, Apple did announce the transition from PowerPC to Intel processors to take place in 2006-2007, but Apple was not explicit about the sequence of the transition.
While Apple has not announced the specific Intel processors that they plan on using in the upcoming Macs, MacCentral sources claimed that the Pentium M processor will be used for the early 2006 transition. A higher performance dual-core Pentium M, code named Yonah, is expected to be released by the beginning of 2006. This processor is speculated to be used in the first Intel Macs.
According to the early report, they will retain the same features and form factor, but simply incorporate the Intel CPU in place of the PowerPC one. Few other details are available.