the most effecitve website ever created

I think its microsft.com. 'Cause if its server goes down means, the OS upgrading daily on majority of concern will be dead and implies a major effect on the customers. Cheers. God bless.

I think it is orkut and facebook.these two sites have large number of population.Every day most of the people check and meet their friends through web.I think these two are the largely used web social communities