What is the current world record for the memorization of pi?

According to www.pi-world-ranking-list.com, the record is held by Chao Lu of China; 67,890 digits on 20-11-2005. Pretty good. Additionally, I believe Daniel Tammet still has the European record at over 22,000. Curious how hard it is to memorize a 'few' digits? Take a look at the pi challenge game at cow-pi.com (shameless plug) to see how you stack up against these guys. -Ada