>>   Since i'm on this, What about org-toggle-comment-at-point that would
>>   hide/show comment under the point? org-toggle-comments that would do
>>   this on the whole buffer? Not sure about this though.
>
> You mean to hide this like an outline-subtree????

I meant: make all comment lines visible/invisible, not sure it makes
sense to anyone else - and not sure i'll massively use it anyway ;)

Thanks!

-- 
Bastien