I found an epic "Guide to Out of the Abyss" that you absolutely must check out if you are DM'ing this:
This adventure thinks it is a sandbox, but really it is a railroad in serious denial.
Cool, thanks. I will check out those other threads.http://www.enworld.org/forum/showthread.php?529627-Out-of-the-Abyss-Advice-Requested
(Just one recent thread with a moderate amount of traffic I wanted to include. Feel free to add others)