First glimpse: Nokia's Symbian^4 operating system, take a look at the video demos.  It's nice, but not amazing. 

S^4 is Nokia's response to the iPhone, and at MWC I got a very brief glimpse of S^4 in action--check out the S^4 video that Symbian created based on Nokia's UI here. (Nokia released some screen shots and details of S^4 in January, but I think this is the first video of the platform.) Obviously it's difficult to draw conclusions from a one-minute video of Nokia's forthcoming UI, but I must say I'm a little underwhelmed. Aside from the nice transition animations, it looks a lot like Android and iPhone to me.

Read more: http://www.fiercewireless.com/story/checking-out-symbian-4-nokias-response-iphone/2010-02-24#ixzz0gfBUshS4