I just checked the phsc site, and the date for the spring camera show is now posted. 25 May 08
The show is held at the Scooer Centre - south of Hwy 7 off Martingrove. This year they are posting info on a bus from the subway. Making a early day of it is a good idea.
I have attended this show twice, and there are deals to be found on stuff that does not e-bay easily, as well as generally an intersting collection of 'stuff'. I hunt for flash bulb deals, old paper, and whatever else, and do not usually come away disappointed.