While we earlier only knew it would be next week Deutsche Telekom has told them the roll-out will in fact start on the Monday the 26th, with HTC handsets.
Samsung handsets will be updated in a second wave. We expect all handsets to have been updated by the end of the month.
With must-have applications like WhatsApp only working on Windows Phone 7 Mango I am sure most Windows Phone 7 users cant wait to get to 7.5.
Thanks Julian for the tip.