First off, if I am asking for anything that already exists, I would love to be pointed in the right direction.

I am still fairly new (to TER, not hobbying) but I can't help but think it would be great if there was a search function where you could say pull up threads on a certain topic, or with certain keywords, or in which you had posted a comment to the thread {or perhaps someone else, if you had a particular interest in the input of others).

Does something like this exist?  Or do other think this would be a good thing?