Looks like the folks at Saavn are cooking up an app for Windows Phone . Saavn is a music streaming website which streams Bollywood music . I am a regular user at Grooveshark and I listen to all Hindi songs there but unfortunately Grooveshark does not have a Windows Phone app.
If Saavn comes up with a Windows Phone ( and looking at their database ) – I would gladly shift to Saavn. It feels good to see apps designed for Indian Marketplace coming up.
Thanks to @VJV87 for the tip !