I wanted to try out Amazon.com Prime Streaming video on my TiVo, but soon found out that it's not supported yet. So I tried streaming it to my browser. Works well, great movie.
Q: Can I watch Soylent Green on my TiVo?
A: Amazon Prime: No, but you can stream it in a browser.
Netflix: No. Only available on DVD.
Q: How many movies and TV shows can I watch?
A: Amazon Prime: 5,000 movies and TV shows from their library of 90,000 movies and TV shows.
Netflix: Unofficially from this guy on answers.com, between 43,000 and 90,000.