90nm 970's for Powerbooks?

MacBidouille posts an English translation of their latest rumor posting, hinting at PowerBook processors coming from Apple:

    IBM engineers are going to work hard in order to have the PPC 970 at 90nm ready for the end of this year in East Fishkill's laboratories. These processors will eventually replace PowerBooks' G4s.

MacBidouille has been particularly vocal about upcoming PowerPC 970 rumors with shipment of 970 enabled Macs expected as early as WWDC (June). Their history of rumor accuracy has been variable, with both significant hits (Leaked PowerMac Pics) and misses (4-6 Processor Macs, AMD and Apple Rumors Part II).