Wow!
I have been a really advanced Google user and somehow I have missed that particular one!
Edit:
1. Reading through it I am fairly certain some of these has been defect too. define: in particular is one that I used to use, but that I was sure was broken. Today it worked again though.
2. At least double quotes still doesn't work (or maybe they include text from links pointing to site or something)
3. How did you find this? I've been looking for something like this recently :-)