The pppdialin module has been enhanced to control the proxyarp pppd option. The /usr/lib/linuxconf/lib/ppplogin and paplogin have been enhanced to support it.
The GUI front-end has been enhanced to support the treemenu module. Check out http://www.solucorp.qc.ca/linuxconf/modules.html to learn a little about this module.
Check out http://www.solucorp.qc.ca/linuxconf/images/tree.jpg to get a screen-shot of the GUI mode and ncurses mode. The html mode is not available yet.