The BBC have created an innovative music chart called the Sound Index based on aggregating usage and purchasing data from popular internet music sites:
"The BBC Sound Index analyses what people are writing about, listening to, watching, downloading and
logging on to. It then counts and analyses this data to make an instant
list of the most popular 1000 artists and tracks on the web.iTunes, MySpace, Bebo, Google Groups, Last.FM and YouTube
The more blog mentions, comments, plays, downloads and profile views an artist or track has, the higher up the Sound Index they are. So, the Sound Index is a music buzz index controlled entirely by the public."
The chart is updated every six hours and broadcast on the BBC every Sunday. Yet more good stuff from Ashley Highfield and team:
"Under Ashley's leadership, the number of UK adults
visiting bbc.co.uk has more than trebled from 4.6 million to 14 million
every month and page impressions have increased tenfold to just over 3
billion a month."