Well we did it in April last year, but now a year later, Guinness World Records have finally sent us our certificate!
The old record for THE WORLD'S LONGEST MAGIC SHOW was 24 hours straight, set in India.
A group of magicians in Melbourne, Australia shattered that record with a show lasting 75 hours. (Now I know, some convention shows seem longer that that, but we weren't even allowed to repeat the same trick within any 8 hour bracket!)
If you'd like to read more about it (who was involved, all the stats, and some great photos) go to: http://www.magicunlimited.com/wlms.htm