I had started making one, but I'm not going to use my home network server because it's going to get DDoSed and I have other things I need to use the Internet for. I don't really want to rent a server for a free service when so far all that the vast majority of Blocklanders have done is make my life miserable. To be honest, I don't care about having in-game communication enough to worry about that, either; most or all of my friends use Steam.
Besides which, anything which has most or all of the features of RTB is going to be assumed to rip most of its code from RTB, regardless of whether it's true or not. That's a stigma I don't want to dive into.
But good luck to everyone else!