how about the option to use any correctly sized icon available online theres tons on this website alone http://www.iconarchive.com/
i imagine it as a section in the traverse settings pane much like the way cydia's "add source" page looks, having a default user based website or "repo" that is user maintained the he traversedb webside (prehaps being called traverseicn.com), but also let you enter your own websites to browse for icons on. /u/cxkes please help make this a reality