I don't think I would ever be able to watch the whole anime, but I have read all 717 manga chapters that they currently have for Detective/Meitantei Conan. Sadly, I don't know too much stuff Meitantei Conan related. I have a Pillow from the 11th Movie (It has Ran, Sonoko, and Conan in pirate clothing), a Conan Plush Doll, and a Backpack that features the 13th movie. I've seen five of the movies (4, 10,11,12, and 13) and a few of the OVAs and downloaded them for icon fodder (because I like wasting my life making 100+ icons. :B)
My Christmas list to my dad was pretty much Meitantei Conan (the only other thing I asked for was a Laptop battery) so I've pretty much become an insane fan as well within the past month or so. I've loved Meitantei Conan ever since it was shown on Adult Swim though as Case Closed.