As reported over the weekend the Apple rumor mill points to a big hardware announcement today Tuesday 20th.
John Gruber on his Daring Fireball site posted a short post on what he heard Apple will unveil today. His list contains new Apple iMac, which he calls impressive. Well, I really hope they are. If the new iMac has Core i7 and SSD options, I think I will get weak.
Other new Apple hardware that is supposed to be announced today according to John Gruber includes new plastic MacBook, new Mac Mini (one with OS X Server) and multi-touch magic mouse.

Apple had a stunning Q4. If their new hardware line-up is able to impress they will have huge Holiday sales riding the Windows 7 wave.

Update: New Apple iMac got unveiled, 27-inch and Core i7! - No Touchscreen, but multi-touch Magic Mouse.