wowio is currently a USA-only site, as are almost all sites that sell ebooks with DRM.

I see that wowio is currently showing a page that says they are revamping their service to go global, so I guess we'll see what they have to offer. I don't have high hopes though, since they have no control over the arcane web of copyright restrictions placed on ebooks by the publishing cartels. Linux of any form is generally anathema to DRM publishers, so pdf is about the only DRM format supported on the N8x0 at the moment.

The free ebook situation is best for those who like fantasy and science fiction (lots of free offerings), and books old enough to have passed out of copyright in the USA (classics of literature and 19th century travelogues are common). But even Project Gutenburg cautions that some of their free works are potentially subject to copyright control in some countries, and users must verify their own compliance.