Here are a few threads discussed not too long ago:
*www.thinkdigit.com/forum/showthread.php?t=42320&highlight=tv+tuner
*www.thinkdigit.com/forum/showthread.php?t=42065&highlight=tv+tuner
Internal or External TV Tuner Card?
*www.thinkdigit.com/forum/showthread.php?t=38962&highlight=tv+tuner
*www.thinkdigit.com/forum/showthread.php?t=38445&highlight=tv+tuner