Well, this is a very, very surprising development:
I picked up a T1 at Target yesterday. I was able to download a DRM’ed EPUB from my dropbox account successfully. I was also able to login to my Kobo account and download a book! The library book download process also worked smoothly. They go into a downloads folder. They auto-load right into your booklist.
Amazon Kindle = buy from Kindle Store only on device.
Barnes & Noble Nook = buy from B&N only on device.
Kobo eReader = buy from Kobo only on device.
Sony Reader WiFi = buy from Sony or Kobo on device.
And since Kobo works, it might work for any other bookstore that sells Adobe DRMed ePub, such as Feedbooks.
Now, if we can also get it rooted too…
Now I wonder if Sony went further, including the mutant Adobe DRM that Barnes & Noble uses. This would let people also buy ePubs from Barnes & Noble too — on the device.