For those of you that want to use hamachi to duel or whatever, go ahead. As for events though, the best thing would be if you could figure out what your router problems are and fix them. J2O has a good page that can help you with this.

Hamachi might be used sometimes for events if say, the listserver is down, but most event hosts probably won't bother to start it up unless they are asked. That's why fixing your router is probably a better option.