Rumors that current Powerbooks are End-of-Lifed (EOL'd) have been circulating... hinting at new Powerbooks in the pipe...
CubeZone posts about an Ad that hints of new laptops:
We also have spotted an ad in a French Mac magazine about new Apple products. There is the new Quicksilver and the new iMacs introduced at MWNY, the iBook...and two PowerBooks. The low-end one is a 500 Mhz one and the high-end is a 600 Mhz. We do not think that it is a typo.