The allocation of the first 3 aircraft has been decided, and they will be operated under the DHL Air UK AOC, with EAT doing the maintenance. The fate of the last 3 to be decided late this year or beginning of 2009.
They're in no great hurry, as the last 3 will only come on-line in 2010.
I would be very surprised if they went any other place than Air UK or EAT, but then again this is DHL and they'll be sending the tender out again to the usual suspects (DHL Air/EAT/Polar/ASTAR) and the lowest bidder will get them.
As for the rumours of the 767s being operated by the DHL/LCAG JW (AeroLogic) that's always been a heering. They'll be operating the 777s, and the 777s only.