Is there a way to use facebook chat with out facebook's web interface or Pidgin? I'm not a pidgin user so the Pidgin plugin isn't an option.
Kopete has a plugin. http://duncan.mac-vicar.com/blog/archives/557 it works so-so
Meebo can access Facebook. You can use it's "pop out" feature if you want each chat to have it's own window like a normal IM client. I don't see what's wrong with just using Pidgin though.
IMO.IM, a similar service to Meebo mentioned by Brendan, also has face book and a pseudo-stand alone client for windows desktops that runs in a stripped down IE.
I'm currently using Digsby as a Facebook chat client (and Live, Gtalk and IRC, but that's not the point). Works fine for me.