When I saw it, I couldn't live without one. Got it from http://www.thinkgeek.com.
For all you dba's: the query says,
> select * from Management where Clue > 0
> 0 rows returned
Sadly, the one they sent me said "select * from Users" rather than Management, which I ordered. So I had to send them a letter of complaint with the subject, "select * from ThinkGeek where Clue > 0".
They wanted me to return the shirt. Well, anyway, it's okay as it is. It's just that I don't deal with users; there's a layer of help desk insulation between me and them. Management, now... my buds and I could coauthor Dilbert.