Ah, and while I remember, these good links have been going round the office recently. If you're doing any www design for the blind, or just want to rack up some good karma, try using this screenreader simulation. Actually, try it anyway. It might well change the way you think.
Additionally, there's a list of screenreaders which you may or may not find useful, and as part of the UK government accessibility guidelines, a series of checkboxes for universal access you can use to make sure all bases are covered (complete guidelines listed here -- very useful).