For anyone else as clueless as me, there was an early bird deadline of 3/31, and the regular deadline is today, 4/30. I found out thanks to an e-mail from the NAOC organizers, otherwise I would have missed this deadline!
The next NAOF entry deadline that is coming up will be May 31st. After that the pricing for the NAOC & SAGE events will increase. There is an extra opportunity to save if you register soon as the Canadian dollar has dropped against the US$ over the last few days so there is a good chance to save 4% - 5% from just a week or so ago.