The bubble, I mean. Yes, it caused serious issues at the end, but during the run up of the bubble, all of the major technology we currently used was developed by that massive influx of capital. Slashdot could not have become what it is without the bubble, and you could say the same about just about every other major technology player in the current market.
As for LinkedIn specifically, I'm a bit stunned by the IPO. My LinkedIn account was the 2530th created. That's even better than my Slashdot and ICQ account numbers.