After you install Microsoft's Silverlight plug-in, you can stream movies right in your browser on your Mac.

In-browser streaming might not be the best idea. You can install Boxee on your Mac, and give it access to your Netflix account. You can then peruse your Netflix queue, search for titles, and browse newly available movies. You can use your Apple Remote to control the application completely. You never have to get up from your couch to change the movie. This makes it much more enjoyable for family viewing. Great choice for a ten-foot interface.

Alternatively you can get Roku HD-XR Player and watch Netflix movies on your TV with it.