I just stumbled across Ghostbusters mobile game, Paranormal Blast. The game uses location-based services to create a sort of scavenger hunt for whatever city you are in. Once you find the ghost, you need to shoot and trap it.

The game was created by XMG Studio  and will be available for both iOS and iphone.

Also check out this link where they play the ghostbusters theme using floppy drives:

http://kotaku.com/5936268/ray-when-someone-asks-you-to-play-the-ghostbusters-theme-on-floppy-drives-you-say-yes