I think if you put out non-DRM ePUB, then there might not be a need for AZW since the Kindles can now read non-DRM'd ePUBs. Or at least the current generation can and I don't know if the same applies to Kindle 1s.
@Raiden,
Oh, I never knew Adobe released PDFs to ISO managements. Here I was still thinking it was a closed standard. Well, that's a plus at least.
In which case, release your books in PDF as well. That way those with large screen readers can enjoy your books with all the margins, embedded fonts, and graphics.
