"Inbox" has been invite-only, which has led to people hounding those with access for an invite on Twitter, or even auctioning off their own invitations on eBay.
The good news is if you want an invite, you can get one today, but only for one hour.
Google announced via Twitter today that it will be handing out invites to anyone interested, but only between 6 p.m. and 7 p.m. ET.