I challenge you to find a website belonging to one of the following top level domains:
That is:
- Popular or semi-popular
- Not pr0n
- Nice (not malicious)
I use this site a lot!
http://www.regular-expressions.info/
http://www.mattisright.info
http://www.javaop.info
Those top levels are banned on a lot of firewalls by default because they're nothing but porn/hacker sites/etc.