Lets get this thread on the rails again.
"Looks like ATI has its own 9400M competitor in the works. According to information leaked to The Inquirer, AMD plans to release a chipset, dubbed RS880, with integrated Radeon 4200M graphics around August. That would be in plenty of time for Apple to have new iMacs or MacBooks using Nehalem process ready for fall, assuming the chipset is compatible with Intel's newest offerings. It should be OpenCL compatible and have a 15 percent speed advantage over NVIDIA's similar offerings."
That struck me as really odd. How is a AMD-chipset going to support Intels mobile Nehalem cpu's? The problem is, Apple needs something like 9400m, coz Intels offerings suck. Apple could use HD 4850 for higher end, but that still leaves them without anything that can replace 9400m? RS880 is afaik a socket AM3-chipset.