Ugly, but nice! :-)
I'm guessing the VGA-in is just a passthru and doesn't convert.
It's that way on my s-video to VGA (piece of junk) card. It has a VGA-IN, but it's a passthru, so you can use it as a switchbox too..
According to some of the specs I've seen online (google GBS 8200), it's a 24bit A/D converter chip..
If I hadn't spent too much on my Amiga recently, I might get one as a backup.. ;-)
desiv