There is no real registration deadline. We will accept registrations up until April when the actual judging event takes place. Note, though, that you can't do the workshops until you've registered, and workshops start the 15th.
If you find something about a registration deadline on this site, it was from last year and should be ignored.
The registration information can be found here: http://csuieeedesign.blogspot.com/2011/10/registration-for-2nd-annual-csu-ieee.html