I was at the Mobile World Congress last week in Barcelona, it was the fiesta on Yahoo stand.
There was mainly two annoucement : YahooGo 3 that wasn't a news because it was released a few times ago, and oneconnect
that was the killer app ! it will be released this summer and one connect will federate all social networks (from myspace to linkedin) and IM systems, you will be connected to all your networks and friends with only one client, moreover you will have rss of the news in your network...
I took photos of the congress on my website
and an article (in french sorry guys) on my blog
(you will see some photos of One connect and a photo of a google android platform...)