I wrote about an earlier upgrade, in Seattle, at
http://kindleworld.blogspot.com/2011...rsion-was.html
I see that some are able to access books in NY and Boston and I think I read on these forums last night that this was working in cities other than Seattle (as a quiet beta).
Interesting how subdued this is, but they have to test for reliability, and so far most seem to have good experiences but there are occasional glitches with subsequent download of another book, from what I saw.
- Andrys