Supermicro makes some small microATX boards with tv-out. 370SED, 370SWT ans P3SED i believe...the only PC Chips group(amptron and the like)motherboard with tv out as an option is the 766. Asus makes some boards with tv-out as an option. It is hard to find places that sell the boards with the tv option(I haven't found one yet). but you can find the supermicro boards are easy to find with pricewatch
Amptron boards are actually made by PCChips, so bear that in mind when you purchase one. Rather, purchase two since one will be bad.
They do not have TV out, but they do have integrated audio/VGA/LAN/Modem. I use one in my player.
Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight
"If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."