check out the kinesis advantage, and some other models they have too: http://www.kinesis-ergo.com/advantage.htm http://www.kinesis-ergo.com/advantage.htm There

check out the kinesis advantage, and some other models they have too: http://www.kinesis-ergo.com/advantage.htm http://www.kinesis-ergo.com/advantage.htm There's also another company that makes parallel keys, I think it's called Maltron.