Yes, I still have two Cybikos in my desk drawer. Dead batteries but I'm sure it wouldn't be hard to get them working. I bought one for myself and one for my soon-to-be wife back in university in early 2002. We had a couple classes together and the ability to chat wirelessly was awesome. It wasn't nearly as cool as the Danger gizmo but you didn't pay monthly for it either. I had a ton of homebrew apps for it and some of them were actually really good. Nobody knew what the thing was and most professors thought it was a calculator with a stylus (which was really the antenna).

Edit: I remember using it at graduation, too. My wife was in the audience and I was so engrossed in our Cybiko chat that I took a wrong turn on the stage and ended up getting into the procession line twice. That was embarrassing. Glad I didn't try to use the thing while driving :-)