Shazam lets you identify a song you are listening to, get lyrics, buy it and share it with friends. The free Shazam iPhone app is limited to 5 song Tags per month (unless you installed it before November 2009). A $5.99 in-app purchases gives you unlimited tagging.
Android users, however, can get unlimited tagging with the free Shazam app for rest of calendar year 2011. eBay is sponsoring this promotion. Shazam highlights these two features in the Shazam for Android app.
1. Unlimited tagging sponsored by eBay for all Shazamers using the Shazam Free App and “Shazam Friends”
2. A real-time feed within the App of songs that Facebook friends have tagged, creating a continuously updating list for Shazamers to discover and share new music with their friends
Shazam Launches “Unlimited Tagging” Globally in Free App for Android (Shazam press release)
Shazam (Android Market)