Google's new Inbox is the hot new email app currently in invite-only stage. Although you can get it with a friend's help, here's a surefire way for the rest of us to get Inbox: Send an email between 10AM and 11AM AEDT today.
Here's the tweet from Google explaining the situation (in US time):
— Inbox by Gmail (@inboxbygmail) November 5, 2014
Email [email protected] within that timeframe and you'll get your invite by midday, the company promises. (Thanks Avi!)