My aim is to keep this thread generalized to help others that plan to market "something", with just about anything relating with certification.

My own application will not have wireless, so no FCC problems there.

About the USB certification, I meant the "official" USB seal:
http://www.usb.org/developers/wusb/testing

About for nuking someone's lap, a 5A fast fuse definitely couldn't hurt.

If you use a PC power supply, a wall adapter, or even the power from a USB port then you might need to get a UL certification (here in the US).
That's what I'm afraid of, and probably the Canuck equivalent over here too.

What about batterry-powered?

Robert