buglist "dupe of" column

[Bill Barry]

Approx. how much work would it take to make a dupe of column that would 
show the bug number a bug has been resolved duplicate of (and have a 
link to it)?

A lot of searches on bmo (and probably other public bugzillas) get many 
bugs that are resolved/verified duplicates and I think it would be quite 
handy to have a link to the bug that they are a dupe of (so you can 
quickly find the status of that bug).