(It doesn't do anything on the public side, so you can't search for anything yet, but this end of that function needed to be implemented much sooner than later or it's going to be EVEN MORE of a hassle going back and editing your old work. Also, the search would be really lame right now, because nothing's been tagged, to speak of.)
Go forth! Tag away! As you find more things that you wish you could check, just let me know! There are many, many more things I COULD add, but I'm looking for common stuff, stuff that people would actively look for.