Hmm. Not sure.
The easiest way to looking unfortunately requires you already know the name of one server: smbclient -L host will list, among other things, that host's browse list. You should be able to get one such name with nmblookup -M - but I've never done it that way before; I've always known a server to rummage on.
Wade.
"All around me are nothing but fakes
Come with me on the biggest fake of all!"