For what it's worth I'm passing along this bit of information (by way of Elayne's blog). The National Association of the Deaf has posted a list of those television programs which may and may not have 'closed captioning'. Seems an odd group of choices for which show becomes eligible and many children's shows (such as the popular animated show DEXTER'S LAB) don't make the cut, while a number of sports shows do.

Here's a link to the NAD website which has the list, so you can see for yourself.