A few minor corrections to the 1.3 update you made to the nook review:
1) The "unlimited reading while in a Barnes & Noble store" isn't really unlimited. You can read any given e-book for up to an hour per day. You can come back the next day and continue, but you'll be started at the front cover and have to page through one click at a time until you get to where you left off. B&N does not promise that all e-books will be available.
2) The new browser (currently) does not allow you to download files. It can't be used to obtain e-books from other sites like the Kindle can.
3) The update reportedly makes the dictionary reasonably functional.
Not related to the update:
E-books bought at B&N are delivered in Secure eReader (PDB) format when downloaded to your computer. This allows them to be used with Fictionwise and eReader reader software on a variety of devices, and on the ECTACO Jetbook Lite e-reader. Those same e-books will usually be delivered in the (currently) nook-specific EPUB w/B&N DRM format when downloaded wirelessly to the nook although, as the review notes, sometimes you might get Secure eReader there, too.
The review notes the activation/authorization limits on Adobe's DRM (although I believe the limit is 6 reader devices). It is possible to deactivate a computer with CTRL-SHIFT-D in Adobe Digital Editions--Mac users translate the keystrokes as appropriate. However, doing that does not affect those limits. You get to do six computer activations and six device authorizations, and deactivating and deauthorizing don't count. That's to keep you from switching accounts willy-nilly in order to read secured e-books obtained from all over. Adobe does expect that people will be hitting the limits as computers and devices are replaced; just go to the ADE support page http://www.adobe.com/support/digitaleditions/ and click "Submit a web case", then request more activations or authorizations as needed. As long as you're not abusing the system, Adobe seems to be glad to grant the extras quite quickly. Do not attempt to use phone support; use that Web page for this request.