Name a CD you own that you think no-one else on your friendslist does:
The George Tirebiter Collection (That's a 4-CD set by David Ossman)
Name a book you own that you think no-one else on your friendslist does:
Ordinarily, I'd answer Green Power in Competitive Electricity Markets, but cherylmorgan is on my friends list, and she wrote it!
So, how about The Failure of the Founding Fathers: Jefferson, Marshall, and the Rise of Presidential Democracy.
Name a movie you own on DVD/VHS/whatever that you think no-one else on your friendslist does:
This one is a cheat: The Zombie Legions/Those Darn Daleks, but that's because it's the pair of amateur Doctor Who movies I made in college, and you really can't get a copy unless I make it for you, and I only have one VCR anyway.
Name a place that you have visited that you think no-one else on your friendslist has:
How about the East Troy Electric Railroad? (Although given the overlap between SF fans and rail fans, there's a chance at least one of y'all has been there.)
Name a piece of technology or any sort of tool you own that you think no-one else on your friendslist has:
That's a hard one, but I'll take a shot at the one I just bought, simply because I expect most of you would do this a better way: A USB 2.0 link-to-link adapter, for plugging two computers together via their USB ports for simple file transfers. This is not that esoteric; it's just that I think most people would transfer files by e-mail, home network, or USB drive these days. (I only bought the link in the hope that I could use it to link the two computers together to play Locomotion, but it doesn't work; I'm going to try a crossover ethernet cable next, once I get one or Lisa makes one.)