SLGOGP Draft 1/Discuss 1-3 Structure of the Protocol
A firewall on the viewer side demands that the client initiates connections, but once the connection exists-- polling is not necessary: packets (messages) can travel in both directions and be initiated by both sides.
Therefore, I see no reason for the "long poll" technique. In general polling is a waste of resources, in this case bandwidth, and leads to a (possibly) much larger delay before a state change in the region is updated in the viewer than necessary.
Aleric Inglewood -- 20090314