http://calgaryexpo.com/
April 28 - 4pm to 9pm
April 29 - 1pm to 9pm
April 30 - 10am to 7pm
May 1 - 10am to 5pm
Key guests include:
Famke Janssen of X-Men fame. Stan Lee. Karl Ubran of LOTR and new Star Trek. William Shatner. Peter Mayhew (Chewbacca!) and many others.
They've had a number of high profile cancellations unfortunately, which has hurt the show. Adrianne Palicki just cancelled in the last day or two. I swear she was still on the site as recently as yesterday.
Got a 4 day deluxe pass this year since it was only $30 more expensive and has some nice perks. I think Stan Lee has said this will be his final appearance so that'll be worth checking out.