Apparently soundcloud has recently improved accessibility, though I haven't tried the improvements myself. However, they do have strict limits on how much free accounts can host. I also hear really good things about tunestotube.com. Apparently you give them an mp3 and a single image, and then they turn that into a video and upload it to youtube, that has your audio from the mp3, and just shows the static image as the entire video. I know a lot of blind musicians who use that service to promote themselves. It does mean you need someone to help create a good-looking static image for you. But once that's done, you get to be on youtube, right alongside every other journalist/musician/media organization. So that's the way I'd go, if I were you.