We covered iMO, Gurgaon based startup when they launched software to convert iPhone/iPod Touch into a video game controller that works with existing PC video games, giving it Wii like capabilities).
The startup has launched iStrike, an interactive Tennis game that you play on your windows laptop/desktop using your iPhone/Touch.
iStrike lets you play tennis on your windows laptop/desktop using your iPhone/iPod touch as a tennis racquet (yup, iPhone as a racquet). You can swing, volley and lob your way through a complete tennis match. You can play head to head with your friends in splitscreen mode (up to 4 players) or single-player vs. the computer.
Watch the demo video