The ProDot is a textured, press-on dot that adheres to the shutter button in order to provide finite control and finger-padding. The ProDot was initially crafted to provide photographers a seamless shutter-release free of residual tremors; however, the Custom SLR folks envision a market for all routine button pushers (e.g., mouse buttons).
Do you feel the need to add a little more cushion to your shutter release? Would you pay $5 for one of these? What about $15 for a pack of 3?
Custom SLR has a new Kickstarter project for the ProDot. It started a couple of days ago and is already nearing the halfway mark of its funding goal.