I know that there are quite a few iPhone users out there thinking "wow iTunes has a large catalog of various types of app, but, where's the velocity-sensitive drumming app that I need in my life..".  Well for you rockin' geeks out there your prayers have been answered.  Based on the video below, the $5 app seemed very responsive with the velocity settings on the virtual drum pads finely tuned to create different sound intensities.  The bad news is that the app is not compatible with iPod Touch.  The app actually uses the mic from the iPhone as part of it's function.  The mic is used for what is labelled the 'mic trigger mode".  In this mode, the app virtual pads can be triggered by tapping on a nearby surface with enough sound for the iPhone's mic to receive it.  The sequencing function also seems to be quite cool.  The app is capable of 384 multi-samples per drum, pretty neat novelty gift.  Who knows, we might have a new Souljah Boy on the music scene with it music crated on this thing [we can only  wish of course...].

Video demo clips after the break.