I kept seeing these goofy icons on other people's friends pages, and I finally clicked on one to see what they actually mean.
This guy is doing a Ph.D. dissertation about web logs; this is a survey for people who have blogs about how they use them. The specific icons don't have anything to do with your answers to the survey; you just get to pick whichever one you like best.
It was a quick and painless survey, except for the last section which you, for each of a bunch of occupations, whether you know someone who does that, how well you know them, and whether you met them online or offline. I found it surprisingly difficult to think of whether I knew someone who did job X or which person who does job Y I communicate with most; I guess that just shows that for the most part I don't identify people I interact with outside of work by their jobs.