Thanks gusti for your support. Yes, I'm thinking about technical support, to have somebody who can repair service from trouble when I'll be offline. Now, there is already one guy with access to the server, for the situation I will be in troubles for longer time. In the meantime, I'm monitoring service pretty often, to be honest, it's only few times per week when I'm not online .

Colo server is quite difficult question. In fact, they are really needed only with current "getwork" stuff, which is bad for big pools at all. It is very network ineffective and roundtrips might play some role here. Once "pushwork" will be done (and I believe that it will be really soon), the colocations don't be necessary, as there will be only one request per minute for worker and the latency will be only the half of roundtrip. So I don't want to spend much time on building colocations, because there are some issues to solve. Building scalable pool in one location is another task and I did the pool with scalability in mind, so adding more servers to pool will be very easy when it become be necesary.