I just doit; now 10 minutes I have deployes my link exchange community application; in this moment it will be avaible only for my site visitors, no SEO for this, but you can view and test the process of link exchange; Free, simple, and lovely to use, this application comes instead of paba project that was lost because, probably, the involved number of persons/visitors/editors was to small - it was concepted for a little community; here the community will be contain anyone who wants to get into it. Enjoy it and let my know about functinalities that aren't wrking or you willl like to see there,