"ircbridge" is a connection between the #tcl channel on irc.openprojects.net and the "Tcl'ers chat" - davidw.
Are there any commands available via the bridge to gather info about the person speaking - sort of the equivalent of /userinfo on the chat side?
Not at the moment. It wouldn't be hard to add them.
The code is now in CVS under the tclapps part of the tcllib sourceforge repository.
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/tcllib/tclapps/
Note that you need irc 0.3 (as well as logger) to run this, which is only available in CVS.