multitouch before iPhone
I spent time at Microsoft, working on the as-yet-unannounced Microsoft Surface touch table product. I was in the Surface design studio and, without an official SDK, developed a number of high-polish proof of concept apps envisioning retail and restaurant scenarios which were presented by Bill Gates on the Today Show and Steve Ballmer at the D5 conference in 2007.
My role: I architected and implemented several applications using internal SDKs.