I play in coughDungeons & Dragonscough games in Hangouts and this looks tremendously useful.

The participants are usually spread out across the world... the option to view Hangout times in in terms of local time would be _excellent_.

Secondarily, the ability for the organizer to review the attendees' local times for each proposed timeslot would be great too. It'd be nice to know that your timeslot wouldn't be 3am for half the attendees.