Ewwww!
I'm a happy NetFlix customer. I have no desire whatsoever to become an Amazon customer, for many reasons, including their nasty habit of spamming, an their unethical attempts to patent obvious and widespread business processes.
And Blockbuster is not the answer; I have heard from a very reliable podcast on CNET that Blockbuster still sends its annoying phone robot to nag you if you keep a movie over 24 hours, even though there are no late fees. "Late nags" are not really better.