With the official start of the Mobile World Congress 2009 only hours away, Sony Ericsson announced its Idou smartphone at a press event in Barcelona. We sat down with a few Sony Ericsson execs to talk about the new smartphone, which will be the first device from Sony Ericsson to run on the new Symbian Foundation platform. The open-source Symbian Foundation OS is being built upon Nokia's S60 user interface and the Symbian OS, and will look very much like the current Nokia S60 5th Edition that runs on the Nokia 5800 XpressMedia, if our sources are to believed.