Will be there any Google +1 integration in 3.2. Final? I know there is custom hook, but I am asking for native integration.

Yes a staff member has already posted there would be in the 3.2 final release. :)

http://community.invisionpower.com/topic/338980-the-button-1-from-google/page__view__findpost__p__2129582

OK, thanks :)

Are you serious? XD Isn't Google+ only in Beta-development so far(e.g. invites only)?

It's still in beta but gmail was in beta for many years lol

There are no more invites, it's just a matter of it letting you in or not at this point.

According to Mashable, Google+ will probably be "open to all" on July 31st. (will most probably beat ipb 3.2 final!)