I can't remember where it is I'm supposed to report this, but since I frequent Superuser over most other SE sites, I figured I'd post it here:
http://www.rqna.net/ appears to mirror content from most SE sites without any credit.
http://www.rqna.net/index-isoh.html is their "Superuser" page.
As an example,
The profile links are in-site, and there is no mention of Stack Exchange copyright, in fact, they claim their own at the bottom.