Accessible Radio for the Deaf and Blind gives the beginning of the press conference video viewable from http://www.i-cart.net by clicking on "(press conference video)" on the left . This is an excerpt from a further part of that video, where Cheryl Heppner, Executive Director of NVRC and deaf since the age of 7, explains concretely what live captioned videos will enable deaf people to do.
For more information about this conference, see http://www.harris.com/view_pressrelease.asp?act=lookup&pr_id=2315 .

The English text transcript of this video is given in http://innovateblog.wordpress.com/2008/12/20/live-radio-captioning-for-the-deaf/ .

Update: innovateblog.wordpress.com has disappeared, but the post with the transcript of this video was saved (minus the pictures) by the Internet Archive in http://web.archive.org/web/20090309065627/http://innovateblog.wordpress.com/2008/12/20/live-radio-captioning-for-the-deaf/