Well, Sholin just told me about the release date... I just hope that the API documentation will be released the same day because that's what I need
. Anyway, the code will be ready so it will be a one night work for full Messenger 5 compatibility.
Concerning surprises... well, I don't know... you could not go on the page lol. The only real surprise will be to see if X or Y feature is now available because in most cases, all the possible new features are listed in the Suggestion page.
Patchou.