Originally Posted by mXb
It's a shame Sony's website insist on their DRM software, as some of their books are interesting prices too.
Curse all these different flavours of DRM.
AFAIK Sony is using "generic" ADE DRM which means you can use a Sony DRM epub on the Kobo the same way you can use a Kobo DRM epub. I haven't used the Sony store, so maybe you need to use their software to get the epub, but it should be directly loadable onto the Kobo.
Originally Posted by stewacide
I'm confused: if a bookseller supports ADE doesn't that mean their books will authorise on any ADE compatible device?
Yes and no. Most companies are using "generic" ADE DRM on their epubs so they are fairly interchangeable. However, B&N uses a different DRM system on their epubs that not all other readers (Kobo included) can accept (likely costs extra licensing $ to Adobe to include it on other readers and that's why they don't). The Nook can accept regular ADE DRM though I think.
Outside of DRM (i.e. when there is no DRM on them), the base epub on these are the same, so it's just the DRM that gets in the way of portability between devices.