Railheaddesign is the first to note confirmation of the new iMac in stock at a location (in this case, Microcenter):
I spoke with Microcenter last night, and they have received their initial stock of the 800MHz iMacs 50 of them, to be exact. I was told that they would be setting them up tonight to have them ready for the weekend, and I told them Id be there with bells on.