leebenningfield: If they aren't selling it anymore, why wouldn't they just license it to GOG and let them remove the DRM, and get what little money out of it that they still can? it doesn't make any sense not to, unless they plan to sell it themselves which doesn't seem likely.
They (Bioware) can't without blessing of ATARI who forced them to stop them selling the premium modules in the first place. ATARI owns exlusive license to making and selling AD&D/Dungeons&Dragons based video games so no video games based on those frachises can made or sold without ATARI's authorization. Court battle between Hasbro (owner of the (A)D&D franchise) and Infogrames/ATARI over the the license has added additional confusion to the situation but it seems GOG managed to convince both sides to allow them to distribute the games. Hopefully that means GOG can continue to sell them even if ATARI loses the license in court.
Edit: just checked the wikis for the modules and all three now have "As of December 2009 Atari owns the rights to the module, which is not available for purchase." added to them. There are no citations so I don't know what that statement is based on.
See:
[url=http://en.wikipedia.org/wiki/Neverwinter_Nights:_Pirates_of_the_Sword_Coast]http://en.wikipedia.org/wiki/Neverwinter_Nights:_Pirates_of_the_Sword_Coast[/url]
[url=http://en.wikipedia.org/wiki/Neverwinter_Nights:_Infinite_Dungeons_(module]http://en.wikipedia.org/wiki/Neverwinter_Nights:_Infinite_Dungeons_(module[/url])
[url=http://en.wikipedia.org/wiki/Neverwinter_Nights:_Wyvern_Crown_of_Cormyr_(module]http://en.wikipedia.org/wiki/Neverwinter_Nights:_Wyvern_Crown_of_Cormyr_(module[/url])