I've heard rumors and suspicions that notification emails from FarmHack.net were not going through and they were absolutely right. We were getting thrown into spam boxes because we weren't jumping through enough hoops to prove that we weren't a spam site. I enlisted the folks at SendGrid to send out our emails notifications for us so we don't have to jump through the hoops, they've got it covered!
Check your spam folder in GMail by searching for "in:spam [Farm Hack]" You will most likely find a lot of email in there you'll want to go through. Thanks to all those who reported issues with email!
- R.J. Steinert