I used to be able to host for a little while. But now I can't, and I can't really mess with the router so I don't expect I will be able to in the future. I don't think I'd host anything near a dedicated server, because I think if we get too many of those, the average number of players in each will drop way too low. When I would host, it would either be to show off my levels, or to duel/play around/test levels with my friends.