This is the official webpage for the event. From here, you can search through a list of vendors, click through an interactive map and watch a live stream of events.
The Mobile World Congress also has a YouTube Page for you to stay updated with mobile news throughout the year.
Click through this slideshow for a few pictures and brief descriptions of some of the gadgets being displayed this week.
This is a more in-depth look at the technology announcements from the event. It's a live stream of reporters in Barcelona at the Mobile World Congress.