At this point, I doubt seriously that the Nook will be able to utilize skype. The audio components in it were not designed to handle a mic. Of course they did this to keep the price down...even though I can see a legit reason for having audio input in the Nook Color (unrooted, just as a good e-reader), B&N did not, or they felt it was not cost effective.
I've seen a lot about Skype for tablets (which I have got). It doesn't work (when you launch it momentarily shows the splash screen, and then dies). I contacted Skye support and they were quite clear that they have no software available which would allow Skype to access their system using a domestic wi-fi router. May happen but not specific about when.