My pool is using the one on http://i0coin.bitparking.com/. I've been unable to get the kR105 one to work consistently. It slowly disconnects all the peers over time. I assume this has something to do with the DoS code - it doesn't seem to like existing peers. I had the same problem trying to port i0coin to a recent bitcoin as well so I don't think it's a bug with the kR105 code specifically.