Well, I'm not completely sure, but I'm situated in the unofficially designated channel for EuroFurence on FurNet and that's a quite nice place. Okay, there are lots of idle time, but around certain moments, there are quite a bit of activity there.
Okay, 144 is a bit fewer than 700+ attendees, but still.. not that large difference.
But then, there's the choice of which network to use. I don't, personally, intend to go on AnthroChat, since FurNet is enough for me. No need to be on two virtually parallel networks, just because I can. Although, I took the freedom of joining #ConFuzzled there in all unofficiality, so please feel free to join, should you have the desire to do so. :-)