Heck no. I've seen people do that before, like on MySpace, when leaving comments. Some people have put their addresses such as when they're sending event invitations and stuff. That's really stupid to put anything that can risk leading strangers and weirdos to contact you in person.
I'd love to see someone waste money on a long-distance call to Australia, but I would never give it out to someone I don't have any experiences with in the real world. And you?
If I was on like MSN or something (facebook) talking to a friend, Id give my cell number. What harm can come of that? They cant steal my identity or anything from my cell numberHahaha by the way, directed at "wo" it ony takes 10 guesses for that last number of yours, prepare for prank calls