In Asia, the number 8 is considered very lucky. I thought it may have to do with the shape resembling a Yin/Yang symbol, you know, 'win some, lose some', but no. Found this on Google search and found it interesting so I'm passing it on (hey, you never know...):
The number 8 is considered extremely lucky, perhaps partly owing to its unique symmetry, and perhaps partly owing to the fact that the 8, laid on its side, resembles the Greek symbol for infinity. Additionally, in Mandarin Chinese, the sound byte for "eight" is close to that for "prosperity, wealth", while in Cantonese it is similar to the sound byte for "fortune".
To illustrate how highly the number 8 is prized, the telephone number 8888-8888 was sold for a sum corresponding to USD $270,723 in Chengdu, the capital of China's Sichuan Province. Even the Chinese government got caught up in the euphoria over the number 8 in this olympic year, 2008: the opening ceremony of the Summer Olympics in Beijing began on the eigth of August (08/08/08), at precisely 8 minutes and 8 seconds past 8 PM, local Beijing time!