I'm not a strong user of it, so I'm curious what the perception is. It seems to be highly adopted, but I want to know if it works well when seeking out information?
My Luddite hardcopy background makes me wonder if its lack of hierarchy is an Achilles' heel. (Perhaps specifying multiple tags is the workaround.) I've also noticed a recently-mentioned site where one term seemed infiltrated with overly promotional links, thus my motivation to inquire.