How to use the Rules module to flag a node that has just been created?
FYI, after a lot of search I discovered that Rules2 support in Flag for Drupal7 is already in dev. I tried it and it works well!

There is also a patch as stated here: http://nodeone.se/blogg/learn-flag-with-nodeone-part-7

Not easy to google out! :P
Bye!