Firefox only: Like Last.fm, web service Twones aims to help you keep track of all the music you listen to. Unlike Last.fm, Twones can track virtually any place you may listen to music on your computer, from iTunes to 25+ music sites.
Twones accomplishes this through a Firefox extension that monitors everything from your iTunes, Windows Media Player and Winamp playback to the music you're listening to on web sites, including YouTube, Last.fm, HypeMachine and SkreemR. Rather than requiring you to install a plug-in for each desktop application or waiting for every site out there to support Last.fm, Twones just takes care of it all through its Firefox extension. The catch, for desktop players, at least, is that Firefox has to be running in order for the tracker to work. If you're a Firefox user, you've probably got the browser running all the time anyway, so that's probably not a showstopper.
Twones is a little late to the game, considering Last.fm has established itself as the clear leader in music tracking, but that doesn't mean there isn't room for improvement. Right now the site doesn't have the rich well of information on artists, albums and the like, and most of its data is pulled in from various APIs (artist bios from Wikipedia, clips from YouTube, similar artists from Last.fm, etc.), so they're going to have to be pretty aggressive about innovating if they want to see a wide adoption.
Twones is currently in an invite-only beta, but we've got a couple thousand invites for Lifehacker readers interested in trying it out. Just hit the link below and use the invite code: LHACKER09. If you give it a go, let's hear what you think in the comments.