Got a surprise in the mail today -- my Tuna Knobs! These are knobs with suction cups that attach to your touch devices to make apps like TouchOSC more useable. It's a Kickstarter project and they just started shipping the units out.
The concept is great and they do work, but I must say I'm a little disappointed with the contact they make on my iPad's screen. Once they are suctioned into place, there is still a lot of wiggle room on the plastic knob. In a bass-heavy environment I could see these rattling quite a bit. You can even lift the plastic knobs a few millimeters off the screen while the unit is suctioned on. Hopefully there will be some clever fix for this.
If you're interested, the website is http://tunadjgear.com