Update: As the commenters have noted -- this service is currently only available for US customers. I truly apologize for my US-centric slant.
Last month, Netflix finally started to roll out its Watch Instantly service to Mac users. You needed to opt-in to use the feature, but it was available for those who wanted to access it. Today, Watch Instantly is available for Mac users without having to opt-in -- as long as you meet the minimum system requirements (Intel Mac running OS X 10.4.8 or higher, and at least one GB of RAM).
Watch Instantly is a great way to catch up on a movie, TV show or documentary without having to wait for the movie to come in the mail. You don't get the extra features or super surround sound, but it's fast, the quality is good and it is free to use. If you have a Netflix Unlimited plan, you can watch as many movies a month as you want. If you have a limited plan, the number of films you can stream is also limited.
You can access Watch Instantly from the tab on the main Netflix page and browse through the selection of movies and TV shows. You still need to install the Microsoft Silverlight plugin, if you don't already have it installed. Watch Instantly works in Firefox 2 or higher and Safari 3 and up.
Thanks to everyone who sent this in!