The only one I can think of (besides mine) is a House/Cuddy by leiascully that takes place in a back room right before Wilson's fourth wedding. Do you want me to find the link for that?
Mistakes We Knew We Were Making, Part IV: http://leiascully.livejournal.com/527315.html
Mine: Wilson marries Elaine in My Fathers' Son (http://deelaundry.livejournal.com/7091.html) Marries House in Hello, Godot (http://deelaundry.livejournal.com/22364.html) Marries House (commitment ceremony) in That Time Cameron Had Mono (http://deelaundry.livejournal.com/946.html) Marries House in Covenant (http://deelaundry.livejournal.com/76240.html) "Marries" House in The Pier at Caesars (http://deelaundry.livejournal.com/20474.html) Gets divorced from House in Petition (http://deelaundry.livejournal.com/27179.html) Is married to a woman named Allison in the House/Cam story After the Fourth Wedding (http://deelaundry.livejournal.com/34270.html)
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Mine:
Wilson marries Elaine in
My Fathers' Son (http://deelaundry.livejournal.com/7091.html)
Marries House in
Hello, Godot (http://deelaundry.livejournal.com/22364.html)
Marries House (commitment ceremony) in
That Time Cameron Had Mono (http://deelaundry.livejournal.com/946.html)
Marries House in Covenant (http://deelaundry.livejournal.com/76240.html)
"Marries" House in
The Pier at Caesars (http://deelaundry.livejournal.com/20474.html)
Gets divorced from House in Petition (http://deelaundry.livejournal.com/27179.html)
Is married to a woman named Allison in the House/Cam story After the Fourth Wedding (http://deelaundry.livejournal.com/34270.html)
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http://www.squidge.org/housefanfiction/archive/16/thelast.html
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A Contradiction In Terms (http://community.livejournal.com/kantayra_fic/21411.html) by Kantayra