World Tech Update: Obama's BlackBerry, the Pope, and More...

— -- In this week’s show: the European Commission considers hearing impairment risks caused by personal music players, Obama gets to keep his BlackBerry, the Gates Foundation donates money to eradicate polio, MIT creates a seeing machine, Japan launches a satellite, the Pope gets a YouTube channel, R4 Revolution comes back for Nintendo DS and Hitachi and Toshiba show off gesture controlled TVs.