I don't think they will show a MeeGo phone on the 11th. They will wait until MWC to do that. All this ecosystem talk is about adding value to the devices so I think maybe Microsoft Office type software agreements for Symbian/MeeGo or even Silverlight app/games support on Symbian/MeeGo. Maybe then bringing Qt to WP7 but nothing about Nokia releasing any WP7 phones. Microsoft and Nokia already have a lot of cooperation going on. Bing maps is powered by Nokia's Naveq for instance.