Johnny's thoughts has a nicely detailed step-by-step guide to using WordPress Caching Module to handle the "Digg Effect". Should we all be so lucky. Personally I had a little old page of mine ("CSS Tools") that got dugg and del.icio.us'd on the same day that rendered my bliki inaccessible for several hours. There's a sense of helplessness that comes from not being able to do a damn thing about it while you wait for the surge of traffic to die down naturally. So if you're one of those due-diligence type of WordPress blogger, you should find the article interesting. It sounds fairly technical but not too difficult for those who like to fiddle with their blog config files.