MacWhispers claims that Apple is working on a 30-inch Cinema Display with a resolution of 2400x1500.
This echoes an anonymous report that appeared on MacRumors' Rumor Reject list in late 2002, as well as a recent unconfirmed report.
Two other "Rumor Reject" items turned out to be based in reality -- with early talk of an Apple Branded Presentation Software, which turned out to be Keynote, as well as early talk of an Apple Music service, which appears more likely with recent rumors.