LED Matrix control

[solecize]

So I've randomly got several adafruit LED panels left over from other projects. I thought it might be cool to create some pixel art graphics that would pop up based on what games are selected. I've used an Arduino to control the panels on their own, but I'm not sure where to start if I wanted to do something like this in Attract Mode. Is anyone using an Arduino with their setup and passing it serial data via USB?

I've seen the info regarding multiple monitors, which is cool, but I don't really want to buy a $200.00 VGA control board for LED panels and was thinking I could build a diffused pixel box and use these panels instead.

[solecize]

Well, it looks like MAME has a pretty robust way to get run-time data to pass to other applications which would answer part of my problem. I'd really like to be able to get data from Attract-mode, so I don't have to start from scratch with each emulator.

Is anyone out there capturing run-time data from Attract-mode for any reason?

EDIT:
Well, I just discovered fe.plugin_command which looks like exactly what I needed, just took me a while to discover it.

Looks like I can use fe.plugin_command to pass off the romname.