Take a look what i just found at amazon:
Their description:
Product Description
Enjoy stunning quality HDTV on the high-resolution display of your Mac with EyeTV Hybrid. EyeTV Hybrid receives unencrypted digital and analog TV by antenna and cable, so it not only turns your Mac into the world¿s most affordable flat-screen HDTV and DVR, it is also an excellent solution for the Digital Transition.What¿s more, you can use EyeTV Hybrid to tune in to local FM radio on your Mac and record broadcasts to enjoy later on your iPod or iPhone. EyeTV Hybri… More >>
Go & get it here - i can recommend it:
Elgato Systems 10020974 EyeTV Hybrid TV Tuner Stick for Analog, HDTV and FM Radio Reception