Don't forget that the pre-CookieCon hands-on classes, taught independently by 10 or so instructors, also went on sale yesterday, March 23, 2015. These classes will run at various times on September 23 and 24 prior to the official start of CookieCon. You can read more about the full class line-up and find registration links here: http://www.cookiecon.net/preeventclasses.php. Enjoy! Lots of great cookiers, covering lots of great techniques!
P.S. This same information is also posted on this site's event calendar.