The social music discovery service, which allows users to create virtual clubs and DJ alongside four other users while competing for audience approval for their song selections, has signed up over 140,000 users in its first month.

To control uptake numbers during its beta phase, users could only join if they have a Facebook friend who is already a member.

A posting by Turntable.fm CEO Billy Chasen on the site explained, "We're very sorry, but while we would love to ...