The Mango upgrade will also include a couple of Bing services. Bing Audio is similar to Shazam. Put your Windows Phone 7 device near a speaker playing a tune and information about the song will appear on your phone's screen. Also included will be Bing Video which is basically a scanner that will read bar codes, Microsoft tags, QR codes, DVD and CD discs, and books and texts using optical character recognition.
Once the Mango upgrade is installed, it should take your Windows Phone 7 handset to the next level.
source: WindowsPhoneDevPodcast via WMExperts