Hey guys, although isn't directly related to Xamarin itself, we have started working on a crypto currency mining server software project that heavly relies on Mono.
CoiniumServ is a high-performance pool-server implementation developed with C# that can host multiple pools together with their own wallet-daemon connections and ports.
https://github.com/CoiniumServ/CoiniumServ
We are looking for more contributers if you are into mono, c# and bitcoin like crypto-currency stuff.