Okay, thanks so much for the info. I've been building some custom led panels and this all sounds very handy!
Unfortunately you might want to add Pentax cameras to the list of ones that don't work as well. I tried a Optio WG-2 borrowed and it pops up the photo app when I plug it in, but Madmapper still reports not being able to start any camera device.
I'll see if I can borrow another brand to try again tomorrow!