Which are the most interesting questions posted? By that I mean those
of general interest rather than obscure issues, and which have
received many comments.

To avoid duplication of effort, Researchers may want to see my
response to this earlier question:

http://answers.google.com/answers/threadview?id=779939

Pink:  I was under the assumption that my previous question (which you
answered) was unacceptable because it contained the verboten word
G****e, according to our mutual friend Probono. I checked the rules
which confirmed Probono's admonition. I therefore ceased to see if it
was answered.
  I shall agree to your answer to this second question, and will post
it a third time with different wording.
Regards,
K22

Pink:  Post your Nov 7 comment as an answer and collect the fee.
Thanks,
k22

K22,

While the use of the word 'Google' in a question may cause a delay
(while the Editors examine the question), it will not necessarily
result in a question being deleted. Questions which ask about
pagerank, algorithms, or other specific operations of the Google
search engine or about the inner workings of Google Answers are not
allowed, but the Editors released your original question to be
answered, since its content was deemed acceptable. When it became
available to Researchers, I locked it and answered it, and my account
has been credited with $3.75, for which I thank you.

Of course, I'd be tickled to find additional interesting questions for
you, if you'd like me to go on another quest.

~Pink