TechCrunch reports that some Amazon users received an email explaining the new captions feature and how to search Amazon.com for captioned Instant Video titles. It's fairly easy to browse, as an option shows up on the left-hand side when you're browsing movies or television on the web site.
As you can see (click to enlarge the screenshot if necessary), when I took a look at Amazon.com, 88 movies had closed-captioning in English. It's only a small percentage of the thousands of videos available on Amazon.com, but it's a start. As we've seen with Netflix, it can take a company awhile to go through their library and add captions or subtitling options.
I'm glad to see that Amazon.com Instant Video is now something that I can consider as an option if I want to watch a movie or a TV show. Hopefully, with these new regulations from the FCC, we'll see a lot more accessibility.