This looks very nice. Switching to a split keyboard (Kinesis Freestyle)[1] and a trackball placed in the middle of the split so I can use it with either hand (pic of my current setup [2]) was a complete game changer for my RSI problems. It hasn't eliminated it completely but I am managing much much better now.

My only complaint with the Freestyle is that it doesn't have mechanical switches but it's still quite pleasant to type on imo.

[1] http://www.kinesis-ergo.com/shop/freestyle2-for-pc-us/

[2] https://drive.google.com/file/d/0BzAsjQaobJuoQllYbTVGYlc2b2s...