Thanks for the hands-on product reports. You saved me $4.98 with regard to the Helicon reader.
(Actually I hear they're looking for sponsors so they can go open-source. Maybe they'll get better someday).
I'd appreciate it if someone could clarify something for me concerning iBooks. I know it does audio/video and JS, but will it actually open
an ePub where the opf file is declared (and structured) as "version=3.0"? Even if it was just straight-up, plain text, will iBooks open a valid ePub3 container? I honestly don't know the answer.
People mention ePub3 features
a lot, but I don't really consider an app as "supporting ePub3" (even partially) if it's simply allowing a few ePub3 features in an otherwise ePub2-compliant container.