Remember MySpace? The former social network of the moment just announced it was laying off two-thirds of its international staff (they also recently announced that they would be cutting about 30 percent of their U.S. staff).This isn't a knock against MySpace. It's apparently quite hard competing with Facebook right now. Rather, let it serve as a cautionary note that every thing on the internet seems important and game changing until the day it isn't. Rupert Murdoch, a not-unsavvy businessman, dropped some $500 million on MySpace only to see its market share dissapear basically overnight (thank God for music, eh, MySpace?). He was, you have to imagine, fairly blindsided.That's because no one knows what the next Friendster, or MySpace, or even Google is going to be until it's here and you're suddenly a loser for not using it. But that day will always come, and everyone will be scrambling to scrap their old worldview that whatever the old thing was the most important thing in the world. And when it does, you sort of kick yourself for not realizing that everything-especially the cutting edge of businesses, especially especially the cutting edge of internet businesses-is protean, and will always be replaced by something different and better (and the most important thing ever to happen to the world) before you even know it.