I'll be in the Q400 class that starts March 27th, there is a February class starting on the 21st I believe for the Q400. Not sure about the CRJs.
From what I have heard, there will likely be more class dates, but they are holding off, or
were holding off to see how the age 65 rule effected them.
as of a couple weeks ago, there were less than 5 pilots scheduled for each of the Feb and Mar. Q400 classes.
In case you didn't know, they want you to apply on their website,
www.horizonair.com then down to careers at the bottom.