Hah! Mine's still in the box. Just got it about a week ago so technically I'm an owner. Wish I could help you, but I'm curious about the same thing.

Seriously though, I did a lot of research on using a TV as a MAME monitor and this model turned up high marks. Apparently the S-video input is good (has much to do with your vid card I suppose), and don't forget that this TV also has component in... so you can mess around with the ATI DVI>Component adapter if you have an appropriate ATI card.
All that being said, it would still be nice to hear from someone besides me on the subject. Heh.