This seems to be the new Inter Milan home football shirt made by Nike for the 2008/09 season. These are "leaked" pictures and the shirt is not yet officially launched.
For the majority of their history Inter have worn black and blue stripes. When the club was first founded in 1908, black was chosen to represent night and blue was chosen to represent the sky. After a merger in 1928 with Unione Sportiva Milanese, Inter changed its name to Ambrosiana SS Milano and its colours to a white shirt with a red cross on top of it, the new colours represented the flag of Milan. The Milanese flag kit has been revived occasionally as the Centenary away kit.
After World War II the club changed their name and their colours back to the original incarnation, Inter continue on with the black and blue stripes to this day, leading to the nickname nerazzurri.