I emailed this link to a few people (and got the link via email from a few more), but never got around to posting it here. I'm sure you've probably seen it by now, but on the off chance you haven't . . . it's the Geek Hierarchy chart at Brunching Shuttlecocks. Don't miss the extended version of it. Nor the Frequently Paraphrased Questions. There's also a nice big PDF suitable for printing and framing (if you're especially, um . . . you know . . . geeky).