Not that this immediately addresses your question, but as you may know there is a wiki feature in Etherpad itself.
http://piratepad.net/wiki-style-links <http://piratepad.net/wiki-style-links>
The integration project you've suggested is noted in the etherpad issue tracker:
https://github.com/ether/pad/issues/#issue/187<https://github.com/ether/pad/issues/#issue/187>