Peter Kirn posted an interesting look today at Mrmr - a platform for creating dynamic user interfaces on mobile devices.

The above video shows its use on an iPhone in a recent audiovisual performance and ends with an interview with its designers.

Simply put, Mrmr is a technology that lets you use ordinary cell phones and PDAs as controllers in audiovisual performances, or to participate in interactive museum exhibits, or to use your mobile device in the place of the mouse or trackpad from your full-size computer.

This could evolve into an open source platform for controlling sequencers, DJ and VJ software. 

Mrmr is available now, for free, on iTunes (App Store Link).