The latest version of music tagging and discovery app Shazam now offers instant previews when you tweet a track and offers faster song recognition on the iPhone 4 and 3GS.

○ Much faster recognition, especially on the iPhone 4 and 3GS.
○ Better recognition in difficult environments.
○ Now when you tweet, your followers can play previews right in Twitter through our Twitter Card.
○ Explore charts are more dynamic, showing you what’s hot in the last seven days.
○ New TV experiences (US only).

The update also mentions ‘new TV experiences,’ but Shazam hasn’t yet revealed any details. Shazam’s previous update added multi-track purchases. The free app is available for download on iTunes.