After reading Mark's post about his situation needing a new macbook, and that some comments said that new macbooks will be released in the summer, i wanted to search for rumors if that is true. And indeed it was, this is what i found at MacRumors:

"Marketwatch relays a Commercial Times report that suggests we will see the next MacBook revisions in Q3 2008 (July-September).According to the newspaper, AU Optronics Corp.and Chi Mei Optoelectronics Corp. received orders for flat-panel displays to be used in the next MacBook.
Taiwan's top two flat-panel makers by revenue, have obtained flat-panel orders for Apple Inc.'s new MacBook, the Commercial Times reported Friday, citing industry sources.The shipment target for this new MacBook is said to be in the 3rd quarter of 2008 for up to 3 million units.The MacBook was last updated ahead of expectations in late February. Those updates were relatively modest, primarily replacing the MacBook processor with the new Penryn chips. A 3rd Quarter release would put the next MacBook revisions behind the introduction of the Montevina platform which is due in June. Other reports have claimed that the next MacBook would see "major design changes" with a transition from plastic to aluminum and stainless steel. "