12,000 keys have been sent out over the weekend. The Fun Pimps continue to process data from Kickstarter, Amazon, and PayPal. Backers are receiving their keys and experiencing slow downs in downloads due to heavy traffic from the Fun Pimps servers
To deal with the strain this small indie company has been working over night to add servers for handling the additional load (two Saturday night). The Dallas based company is being flooded with support requests. It seems that in the rush to get these keys out backers are facing database errors, account verification issues, and general questions about setting up and playing the game.
The Pimps' roll out strategy seems to be a three phase plan. First, they are rushing to get everyone their keys in the most efficient manner possible. Those who bought multiple keys or require manual support by the staff are going to have to wait until the bulk of the keys are released. Finally, the guys plan to focus on general support for 7 Days to Die.
Here is a Sunday released e-mail about the released keys.
There's been no mention at this stage for how to officially report bugs or be better play-testers. However, localized communities are organizing to collect data (photos, conditions, video, bug, threat level etc). It is a good idea to join these groups that wish to improve the game. In "The Science of Playtesting," GameStop gives an overview on how to be a better play-tester.
Those that are only interested in playing the game, please try not to plug up the communication channels with complaints or destructive criticism as this game is in alpha. Many folks have high hopes for this game.
UPDATE: (Still no key)