I want to second this. The Kinesis Advantage solved most of my RSI problems.
It's not just that it's a split keyboard. It's things like having depressed keywells with each vertical row at a different height to match your fingers. Having control and alt under each thumb solved the "emacs pinky" problem for me.
I have often benefited from recommendations for Things I Didn't Know I Wanted.
Given that Less Wrong is a community of unusually intelligent, critical, and self-improvement-focused people, I suspect we can generate a pretty helpful thread of product recommendations — perhaps even a monthly thread of product recommendations.
Rules: