I saw a question tagged [plsql]. I have no idea what it is, but judging from what I saw in that specific question, I'd like to know more about it.
It would be nice if I could click on the tag and get a short description of the technology with links to more info. Sort of like the tag pages for sponsored tags have now.
Naturally this isn't very important, since it's easily Googled, but it would be a nice extra service. The info pages could be wiki as well (or probably must be for the idea to work).