Rumors about the next generation MacBooks get more concrete. Seth Weintraub reports on the ComputerWorld about the new features he heard from his sources about the next generation Apple MacBook notebooks.

The new MacBooks are supposed to be thinner (save guess) and feature a tracpad with glass surface with multi-touch and gesture support. Glass is nice to touch, but you sure will need to clean it every day with Windex.
The body of the new MacBooks would be made from a single piece of aluminum.
The new MacBooks most likely run Intel Centrino 2 and are supposed to be already coming end of September.
More details on ComputerWorld. See also this new rumor about new chipsets in the new MacBooks.