If you can still get analogue TV signals you may want to give DVBLogic’s latest product a try. DVBLink AnalogTV! is a server for analogue TV signals including FM radio channels and brings them to Windows Media Center. You get full EPG supports via Media Center, xmtv of other supports EPG sources and supports SECAM, PAL and NTSC. It maybe worth digging out your analogue tuners even if it;s just for FM radio in Media Center.
Details from DVBLink: