NEW YORK ( TheStreet) -- The 2011 Mobile World Congress show in Barcelona this week offered a few new treats to the already brimming basket of wireless devices introduced at the last industry event, the Consumer Electronics Show in Las Vegas. Tablets once again took center stage. The "geyser of Android tablet launches" caused RBC analyst Mike Abramsky to craft the acronym "NAAT!" for "not another Android tablet" in a research note Wednesday. There were also smartphones aplenty, some even sporting Facebook buttons. The MWC was a major win for Google's ( GOOG) Android operating system, as new partners and new Android devices played a big role in the week's unfolding drama. And of course, who could miss the sudden shift in world powers on the eve of the MWC as Nokia ( NOK) and Microsoft's ( MSFT) massive strategic partnership suddenly realigns the playing field? Here is a look at some new features and devices from Sony ( SNE) Ericsson ( ERIC), ZTE, HTC, Microsoft and Facebook.