No more SwitchProxy extension for switching MouseHoles. Added to ~/.conkerorrc:

 // alter user preferences
 function set_pref(k, v) {
   if (!gPrefService) { message("EEP: no gPrefService"); return 0; }
   gPrefService.setIntPref(k, v);
   message(k + " set to " + v);
 }

 function get_pref(k) {
   if (!gPrefService) { message("EEP: no gPrefService"); return 0; }
   if (!gPrefService.prefHasUserValue(k)) return null;
   else return gPrefService.getIntPref(k);
 }

 // toggle proxy
 function toggle_http_proxy()
 {
   var proxytype = get_pref("network.proxy.type");
   set_pref("network.proxy.type", proxytype == 1 ? 0 : 1);
 }
 add_command("toggle-http-proxy", toggle_http_proxy, []);
 define_key(ctrlx_kmap, make_key("p", 0), "toggle-http-proxy");

So: C-x p. Seriously, go sift through this stuff from Bill Clementson [pt. 1 and pt. 2] and you’ll pick it up. The rest of my .conkerorrc is pretty standard, but the numbered link styling is essential, in that del.icio.us actually looks really good now.