I've used my Nook2 for a week or so. There is ghosting, but it really hasn't seemed obvious. I don't think I would have noticed it if I hadn't read about it all the time (on compulsive pre-purchase forum lurks

). It's very hard for me to notice it in an indoor setting, a bit more noticeable in bright (and I mean sunburn-level bright) sunlight. Hardly a deal-breaker for me. I still kept mine and retired my old nook (rooted it finally and am planning to pass it on to my cousin who asked for it

).
YMMV but I have to work hard to really see it

. If you really want to simulate these conditions, wear a bicycle lamp or a miner's headlamp

to your B&N store and ask to see the store model. If the people with the butterfly net fail to catch you, please post the results of the experiment here. The things we do for science

.
Other things:
1) Combined library is nice. All covers show up. Non-B&N books STILL do not show metadata other than title and author (like summary, publisher, tags, etc.) This still bugs me a bit but I've given up hope on B&N implementing this. *shrug*
2) Otherwise, there seems to be no distinction in capabilities of B&N and non-B&N books (oh, the highlights and currently being read stuff only syncs for B&N books of course).
3) I put all my sideloads on an SD card. They all show up under "Books" with covers. Highlights, etc. work equally well for both and highlighting is a pleasure to behold (after a few clumsy starts). Highlights and bookmarks are intelligently handled and listed with a few words and page number to remind you what they are.
4) I've been to the Home screen exactly twice. It is entire unnecessary unless you buy heavily from B&N and want recommendations - I don't like it at all. Luckily it is eminently ignorable and you can go straight to the library using the n key menu. No harm done. Every device has unnecessary features. As long as they are unobtrusive - *shrug*.
5) I've given up hope on intelligent shelving and exporting notes, etc. It's a zen thing at this point

. Basically, B&N has matured past its "transparently force the reader to buy from us by hobbling basic features for non-B&N books" business model. This is a good thing. Now they can move forward and actually start building a great e-reader. The nook2 is a good beginning towards that end.
6) It's fun to read on it - really

.