just be sure you know how to work it! My friends were flying down to Florida in March and they took their new video camera with them on board, figuring they had 3 hours to read the directions and figure out how to use it....
Well, when they were at security in PVD, the agent asked them to open it and turn it on, my friend told the agent it was new and he didn't really know how to work it... The agent said, "I have one just like it and although I can't turn it on for you, I can tell you how to do it" and instructed him how to turn it on... and gave him some more pointers about using the camera while checking it out (security wise)...
I suppose not all agents would be so understanding and patient... but just goes to show you really should know how to use the equipment.