Most decks of playing cards memorized - single sighting

According to Official Guinness Records,

Dave Farrow (Canada) memorized on single sighting a random sequence of 59 separate packs of cards (3,068 cards) at CTV Studios, The Daily Planet, Toronto, Canada on 2 April 2007.
The attempt took 4 hrs 58 min 20 secs not including breaks. Dave made just one mistake during the entire attempt which he corrected unprompted.

For a complete list of 2007 records, please visit 2007 Guinness Records in Canada.

Other Canada records that might interest you:

• Longest marathon breakdancing by a team
• Most push ups with one arm using back of the hand in one minute
• Largest ice hockey tournament
• Highest wine cellar
• Largest press conference underwater