with my first post I also would like to announce a little helper: IntersectionMerge (R12+/Win/Mac).
It is a command to merge two points along their edges to their intersection point.
If it is useful for you, drop me a note ;)
Edit: Is there an admin around, to move this post into the Post Here Your Plugins (http://forums.cgsociety.org/showthread.php?f=94&t=58987)? Think it belongs there ... Thank you!