iSuppli's Rassweiler said that until he could look at the chip, examine what he called "the geometry of the die," he had no more information about what the A4 actually was than anyone else. "I'm betting it's not off-the-shelf components," he said, talking about the A4's CPU and graphics processor, "but instead that it's a customized version from standard building blocks."

Gregg Keizer covers Microsoft, security issues, Apple, Web browsers and general technology breaking news for Computerworld . Follow Gregg on Twitter at @gkeizer , send e-mail to gkeizer@ix.netcom.com or subscribe to Gregg's RSS feed .

in Computerworld's Macintoshes Knowledge Center.