μTorrent, the defacto standard BitTorrent client is getting an upgrade. The forthcoming 2.0 version will feature a new implementation of the BitTorrent protocol called uTP as created by several developers including Bram Cohen, the inventor of BitTorrent. The stated objective of uTP is to eliminate ISP throttling. In recent years, some internet service providers have limited BitTorrent traffic on their networks by throttling. The new protocol seeks to eliminate that by letting BitTorrent play well with others. It's network-aware and will self-throttle if other traffic on the network is being limited. Ostensibly users may see somewhat slower downloads but other network traffic will operate better than currently such as web browsing. Ernesto over at TorrentFreak has the scoop.
There are a lot of uses for BitTorrent, but I find it good mostly for downloading and sharing open source software such as the Ubuntu Linux operating system and the OpenOffice suite. If you're so inclined, you can read the uTP protocol (uTorrent Transport Protocol) specification or download the μTorrent 2.0 beta. It's Windows-only at the moment but is certain to spread to the other BitTorrent clients once it's proven.