1. The accounts will have a system authenticator (digital and possibly physical) similar to WoW - official information will come out next week.
2. In case of account hacking the account may be restored to their prior state before the intrusion.
3. There will be live in-game support (similar to WoW) through tool that we already use to report BUGS, we will be able to contact a GM in real time.
4. The end-game is not 100% completed, there is much work to do, but ANET is not expecting the the end-game to be reachable quickly, they are now focused on the release, if all goes well they will move on to work at 100% in the endgame (DiabloIII nostalgia??).
PS - They are aware of the disaster of Diablo with the end-game and ensured that will not happen to GW2, after the release team will jump all just work in end-game.
5. Are being explored new methods of PvP, GvG is confirmed to return to GW2, but said they could not disclose much more.
6. New merchandise will be launched on 28/08/2012, including Dragon T-Shirts.