Sir Joltalot writes "It seems as if the NWN linux client might not be as delayed after all. From the client page: "We have just been informed by Rad Game Tools that they have Linux versions of both Bink and Miles. ... This solves the two outstanding issues with the Linux Client, and I bet we will have even more good news for you in the coming week in terms of future Betas or Demos of the Linux Client.""
You'll excuse me if I opt against holding my breath ;)