Copies of Dark Druids are once again available for sale directly from CHP, and more should be headed to Black Blade Publishing and Noble Knight Games in the next few days.
Check out the two most recent Dark Druids reviews; admittedly these are from about six months ago, but they still go into great detail about the module.
The first is by Courtney Campbell, the thoughtful & well-spoken author of the Hack & Slash blog, who also crosses disciplines into illustration (including some awesome illos in Dark Druids!):
The second is from the Follow Me, And Die! blog: