...to the number of movies you can put on your Netflix queue. And it's 500. I have been hovering between 485 and 500 for years (I first joined my senior year of college). At the rate of one movie a week (when I was still in film development, I was on a much more rigorous subscription plan--3 at a time, and I had them on constant rotation so I was watching about 4-5 movies/week), it will take me 9 years and 6 months to finish. And, of course, there are always new movies to be added.
If you ever need movie recs, I'm more than happy to share my queue, and my viewing history to date =)