The accessibility things vary a lot between countries but there are a load of common things which I think would be fairly simple for inclusion in the standard distribution of sNews.
Things like make sure all images have alt tags, all links have titles, all forms have labels, make sure it validates etc etc are common to most countries.
I think 1.4 was mostly OK in this respect, but I seem to recall there were a few images lurking around that didn't have alt tags :/