Here's what my records from last year show:
Canadian Code (JHC) released May 15th for July 1/03 - Oct 31/03, minimum 3 night stay, must be booked by June 30th.
All Stars, value season, standard room $51.59 US
Moderates, value season, standard room $89.11 US
*note summer is standard season for value & moderate resorts, not value season so these rates were not for summer dates (these are the only rates on the sheet I printed last year...sorry)
Disney based these rates on $.67 USD = $1 CAD
Rumour has it this year that there may be an FTP but it will be 7 days for the price of 5...not nearly as good as last year's 7 for 4 (released May 6th for DC, May 8th for the General Public).
Other than FTP, I find all the codes seem to be similar in price (give or take a few $$).
Here's a list of past release dates for codes:
Mousesavers - Code Trends