Apple updated the shipping estimates from 'October' to 2-3 weeks, in the last 24-hours. Rumour is it will be selling from next Tuesday. It's unclear whether it'll be a true update or simply a change in some of the component materials used, to adhere to the EU Nasty Materials law (don't recall the name).
The iMage looks good, but no mic - I'd like the iSight for my MacPro & iBook, so the Mic would come in useful for the Mac Pro.