Apple switching to AMD graphics in 15- and 17-inch MacBook Pros?

Back in December, CNET let loose a rumor claiming that Apple would be ditching NVIDIA in favor of Intel and AMD graphics in its future MacBook lineup. Now, here we are with a credible leak showing an entry level 13.3-inch MacBook Pro sporting a Thunderbolt port, Core i5 Sandy Bridge processor, and Intel HD Graphics 3000 with 384MB of DDR3 SDRAM shared with the laptop's main memory. Today CNET is repeating its original claim while adding that the 15- and 17-inch MacBook Pro models will feature an automatically switchable AMD discrete GPU that augments the Intel graphics whenever more power is required. Of course, they'll also feature that new Thunderbolt port and 32-nanometer Core i series Sandy Bridge processors for improved performance and power savings. We'll see soon enough, since the whole thing is supposed to get official later today.