By now, you've probably read that Apple's holding a "Mac-related" presentation on Tuesday at 10 a.m. Pacific. You may have also read the predictions that we'll see a new iMac introduced at that meeting.
The prediction makes sense—the iMac is currently the "gray beard" of the Apple lineup, an aging-if-dependable workhorse that's made its way into many homes as the first Mac in the household. So predicting that Apple has chosen to upgrade this machine, and swath it in aluminum to match the mini, MacBook Pro, and Mac Pro, is about as risky as predicting that Paris Hilton will make tabloid headlines or that George Steinbrenner will rant about his Yankees' poor performance at some point during the season.
Read my Macworld blog entry, My Apple event wishlist, for the rest of the story...