I have setup a giant cluster of P2Pool instances. You can mine with us using credentials just like any other pool. However on the backend, everything is running P2Pool. Everything is also load balanced for failover and high availability. As of now things are running with zero fee's, and my plan is to add merged mining eventually to cover operational costs.
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http://p2pool.ioI'm asking this because I'm working on a VPS node as well... I noticed your efficiency is 56% which is not so good for a p2pool node....
How are you working on the latencies?