@kassen. I completely agree with your take on both the pros and cons of  an extra issue tracker.
 
What I dislike about the wiki option is that it currently requires non-members to request a user with an account on the CS wiki to ask a member of CS Staff to create an account.

It does? I can't remember that from creating my own. I do know there is a significant spam problem there.

Ah. The change is probably spam related then. Here's a screen grab of the not-so-friendly registration screen at the moment:
http://img.skitch.com/20091228-c6rsmfqnnerdhritkjip3u9kh1.jpg