For the 2000 Sydney Olympics, the gold medal winners appeared on stamps the next day:
The Sydney 2000 Olympic Games provided Australia Post with its greatest-ever stamp sales success. Australia Post debuted a world first by issuing instant stamps depicting each Australian gold-medal winner after the medal ceremony. The instant stamps were available for sale nationally coast to coast by midday on the day after the medal was awarded.
The use of modern digital camera technology and high-speed data transmission lines allowed the stamps to be produced next day for every gold-medal winner.
[Interesting that my original link was blocked]
For the Queen's 75th birthday, Gibraltar produced a stamp in 10 hours and 24 minutes:
http://www.allaboutstamps.info/inde.../records/114Other countries have produced fast responses to sporting victories. New Zealand's response after winning the 2011 Rugby World Cup:
New Zealand Post has been working throughout the night to create a very special collector's product, the RWC 2011 Champions Stamp Sheet!
This highly collectable stamp sheet marks last night's incredible Rugby World Cup 2011 victory by the All Blacks, and is the fastest stamp product we've ever produced! It will hit PostShops in main centres tomorrow, rolling out across the whole country by the middle of this week.