Bittorrent is a great way to download legal software, videos, and especially Linux ISO images. Unlike regular site-based downloads, bittorrent files download faster if the files are more popular. The opposite is often true for traditional website-based downloads.
In September, new Bittracker software will be released that is location-aware. Currently, pieces of downloads come from random "peers". The new software will try to find the closest "peers" and give them priority. This will mean each piece travels less distance over the internet, making it faster and with fewer hand-off connections (hops). This will benefit not only the person downloading but it will also mean less internet traffic (lower bandwith used) for ISPs.
Peerialism AB
ISP Friendly BitTorrent Tracker Doubles Download Speeds