This thread serves to lead anyone looking for info on navmeshing to exactly one place. It contains some links to threads with navmesh info, I find were helpful. More can be added, and you're free to add you're own info to this thread. The best I can do is have it in my sig, as I'm not gonna ask for it to be stickied, as its a bit cluttered up there as it is. These links will come in no particular order.
First off: http://www.creationkit.com/Bethesda_Tutorial_Navmesh
http://www.gamesas.com/topic/1442478-editing-an-exterior-navmesh/?hl=navmesh#entry22227386
http://www.gamesas.com/topic/1434370-navmeshing-headache/?hl=navmesh#entry22021059
http://www.gamesas.com/topic/1425147-nav-mesh-consensus/?hl=navmesh#entry21918456
http://www.gamesas.com/topic/1422381-navmesh-question/?hl=navmesh#entry21777242
http://www.gamesas.com/topic/1418264-on-editing-exterior-navmeshes/?hl=navmesh#entry21691067
http://www.gamesas.com/topic/1406584-navmesh-doublingsigh/?hl=navmesh#entry21484711
http://www.gamesas.com/topic/1463522-navmeshing-exterior-over-crossed-borders/page-2?hl=navmesh#entry22797720