GBA Compatibility is awesome, only games that need real special patching AFAIK are the pokemon games for the clock features.
EDIT: also -
Worked with Superpass 2 for me.
Here's a better pic of the stock interface:
http://www.radi-8.com/ds/stock.jpg
There's a kit to reskin it available, here's mine for example:
http://www.radi-8.com/ds/nt_skin.jpg
Here's what I think it should look like (functional mockup I coded)...