The Adobe/B&N joint press release is here:
http://newsblaze.com/story/200910201.../topstory.html
The summary is this:
B&N will be using their current flavor of DRM (content locked to a user name/CC#) for selling ePubs from their store.
B&N has licensed this scheme to Adobe for inclusion in the RMSDK (Reader Mobile SDK – it’s the ePub/PDF engine we license to device manufacturers) and ACS (Adobe Content Server).
Adobe in turn has licensed the RMSDK (that includes this method as well as our current method) to B&N, who is using it to implement ePub/PDF rendering on the Nook.
Other RMSDK customers will get this as part of the 9.1 release of the RMSDK (early 2010). When those customers choose to include it on devices/firmware upgrades will be up to them.
ADE 1.7.1 (the current version) does not support the new DRM format, but we do plan on releasing a version that does (and no there is no publicly released date for that version of ADE available yet).
This will cause confusion in the short term about what will work where as we get everyone (including us) ramped up, but the long/medium term goal is that from a customer perspective – it’ll just work.
Some additional notes:
Yes the Nook does look nice.
Yes you can sideload (via USB) current ACS4 protected content (both PDF and ePub) - as well as unprotected PDF and ePub.
I can't comment on how PDF looks on it yet, as I've only gotten to see the Nook at B&N, and we don't have the devices here at Adobe yet to test.