The first--and still the best--mainstream way to watch TV programs online is through iTunes, a free program that lets you catch up with episodes you missed or savor those you enjoyed. Download and watch shows on your Mac or PC or, if you don't mind Coneheads that are a millimeter tall, on your Video iPod.
Top shows: Lost, Desperate Housewives, Saturday Night Live
Best feature: Clean, viewer-friendly design
Cost: $2 an episode
Unveiled just two weeks ago, Google Video boasts a variety of content, including episodes of the highbrow Charlie Rose show and such...