A) Not sure if DRM is just that...I thought there was more to it.

B) No idea what you mean by downloading, e.g. do they cache locally, probably, do they generously export to a copy you can read on your Dell Axim, no idea. They do show a bucket-arrow download icon and progress spinner for free after each purchase.

P.S. If you buy some coffee table monstrosity like "Visual Dictionary of Marvel Universe VFX Contractor .tmp Files" you will get to know the download spinner very well...

Yes they do but not all titles. They use Adobe DRM. If a book says "Best for: eReader" it should be downloadable. I think that used to say compatible with which made more sense...