Thanks to a friendly prod by tech columnist Jared Rimer who pointed out to me various ways in which the rewritten Magnatune site was not accessible to the non-sighted.
I've put a few hours of effort into fixing that, with the help of a few tools I want to recommend:
1) The Firefox Accessibility Extension lets you browse your web site as someone who was using text-to-speech might experience it
2) the Google Chrome Accessibility Developer Tools
Please send me email if you find any problems or ways we could improve accessibility on the new Magnatune web site.