Maybe it's an already-asked question, but i can't find accurate informations.
Do you know a serious hosting that supports phpbb and accepts bitcoin (or altcoins) as payment?
I will accept BTC and I can offer hosting on one of my servers, apart from phpbb support, anything in particular you are looking for in hardware such cpus, ram, disk space?
Do you want root access or managed hosting? PM me if you are interested.