For those who care, GOG.com is now carrying Neverwinter Nights 2 (including Mask of the Betrayer, Storm of Zehir, and Mysteries of Westgate).
At the moment, it is on sale at $14.99. Be aware it is large (6.9 GB)
Thanks for the heads up on this, Bri! It's finally motivated me to join GOG. I've been looking for a decently priced copy of the main game and in particular MotB for a while now.
It's a big download and my connection is a bit iffy. Does anyone have any experience with the GOG downloader? Does it help with such large files or is it dodgy?