Tapulous offers everyone who downloads any of their iPad or iPhone Tap Tap games a free subscription to their music newsletter. In each newsletter, there’s a link for that week’s free music track you can download for the app you’re using.
If you play Tap Tap Radiation on the iPad, I stumbled across a way to get a few of the older “free” tracks. Just copy the current link and paste it into Safari on the iPad…
…and change the number before /ttrad.php.
…will take you to different songs to download for free to play.
I went back to 68 and didn’t see anything past that, but for those of us who just got this app, this adds a few more tracks to play while we’re passing the time.