For all the italian reader a good way to practice your listening is listen to Podcast. For Geek / Computer Science People the podcast This Week In Tech (TWiT) is a nice way to be up dated by a bunch of funny guys. The show hosted by Leo Laporte approaches the Hi Tech Web news from a management/technical point of view. Very nice! you can find it here: http://leo.am/podcasts/twit
Even more interesting is via iTunes U the chance to access podcast of the lessons of some of the greatest american Universities such as Berkley, Stanford, Yale, Princeton… So good english AND 100% guaranteed technical content. Enjoy it!!