Netflix is adding subtitles to more streaming content:
In the US, more than 3,500 TV episodes and movies have subtitles available, representing about 30% of viewing. (This is in addition to the subtitles already available “burned in” to the picture for all non-English content.) More subtitles are being added every week, and we expect to get to 80% viewing coverage by the end of 2011 (with similar goals for Canada).
They also have a new page that lists all subtitled streaming movies and television shows.