http://www.brasnet.org/conteudo.php?id=492 used to state they currently have over a million users per day. The existence of such a gateway had been announced to those users and there was a continuous flow of traffic in and out of the gateway.
Still, the users weren't so impressed to be able to use Jabber from within an IRC network, after all. They came to talk between themselves, mostly.
<coyo> it's still really cool, though