CNET reports Apple will likely launch the MacBooks on Tuesday. This is an Intel-based replacement to the old iBooks.
Both Apple Insider and ThinkSecret are reporting about a possible press conference Tuesday to unveil the new line. And the Unofficial Apple Weblog notes a screen up on the Apple site temporarily Friday that features the MacBook name, without the "Pro."
Apple introduced the 15-inch MacBook Pro in January and started shipping a 17-inch version last month. A CNET review pits the 17-inch version against the Acer TravelMate 8200.