New February builds of Frostwire for Windows, Mac and Linux includes the feature. Besides Bitcoin, the donation feature also supports less widely used Litecoin, Dogecoin and industry standard PayPal.
When clicking through, you will be met with a custom donation page, the first time torrents have had a true monetization option. "Using Bitcoin has definitely widened our reach to people who don't necessarily listen to our type of music, but like that we get down with Bitcoin, and started listening to our music, which is a cool thing in itself," says lead singer Saidah Conrad (via TF).
The best part of the new system for artists is that all donations go straight to the band, with the torrent client not taking any piece (or anyone else).