Sony is releasing “Nick and Norah’s Infinite Playlist” on October 3, 2008 and to help promote the movie I saw there’s a little widget they’ve put together so you can put together your own mixtape. It’s a pretty simple idea but well done and easy to use.

If you jump over to Nick and Norah’s movie site you can build your own widget and then embed it on your site or just email it around. Whether you use it to make your own mixtape or not it’s a cool way to check out some new music for free. I, however, did build my own mixtape which you can check out below.

If you’ve missed the trailer for Michael Cera’s new romantic comedy check it out here.

Nick and Norah’s Infinite Playlist hits play in theaters on October 3, 2008.