The address for the Mobile World Congress 2010 is: 
Fira de Barcelona - Montjuic
Avinguda Reina Maria Cristina, s/n
08004 Barcelona
Spain
Main entrance of the venue in 2009:
Overview of the venue in 2009
Agenda of the 3 GSM venue of 2010:
Inside the 3 GSM venue of 2009: