Here is an article recently printed on maccentral:
Apple's renewed relationship with IBM doesn't mean that Motorola will be going away anytime soon. In fact, Apple will keep one G4-based configuration around for as long as the market demands. The G4 model will sell for $1299 directly from Apple.
"Motorola is huge for us," said Joswiak. "Our partnership with Motorola is not going away, G4s are in every other part of our product line. As you can see, [the G5] is not going in a PowerBook anytime soon. Motorola remains very important to us, but IBM is the one that can take us to the next level."