We’ve seen several announcements lately where mobile phone cameras are being leveraged as optical motion sensing devices for enabling motion applications in mobile devices. While some accelerometer-equipped phones are available outside of the U.S. — and the iPhone will soon bring this to the North American market — most phones shipping today (and likely for the foreseeable future) won’t have these devices inside.

ConcreteSoftware has just launched a “3d Lawn Darts” game which is motion-enabled for the Windows Mobile platform. Expect to see more announcements like this in the short term.

We’ll be exploring the optical option — its benefits and shortcomings — in a future piece.