First up, I've been spending way too much time over the last couple of
days on pmog - a sort of massive multiplayer online webquest on
steriods (firefox browser addon required) - you'll need to play it to
see what I mean.

In the 'game' you can lay down commented trails (missions), along with
traps, chests full of goodies and portals...
Surf on over to http://pmog.com for the rundown and the addon. If you
join up, make me an acquaintance and/or try out the missions I've
created so far... http://pmog.com/users/botheredbybees/missions/generated
(put on your armor first, I've sprinkled mines liberally on the false
trails)

Another online activity you might enjoy is found on the Forrester
Groups' Social Technographics Profile tool:
http://www.forrester.com/Groundswell/profile_tool.html

I plugged some demographics in for a couple of my classes with
interesting results. My only problem was that I don't seem to have any
classes made up from just one demographic - typically about 1/3 of the
class are over 55, half are under 25 and the rest are scattered in
between. Still, it was an entertaining 30 minutes.