I've grumbled about the uselessness of the "Similar Threads box in the past, been wondering how to make it useful.

Currently it just appears to search the Thread title and do a word match, which is very limited (albeit not totally useless).

Maybe a "Similar Thread Link" button could be added, so people could quickly connect up threads? I know we FOGs (Forum Old Gits) tend to just put an "As talked about {url="old thread"}here{/url} " post, but this way would make the "Similar Threads" box more useful. Plus the linkage wouldn't be lost 20 posts later.