It's interesting to read Adam Lashinsky @adamlashinsky talking about the Dotcom bubble. I was living and working in SF and very much inside that bubble and he captures it's exhausting exuberance nicely.
However, I don't think this time is quite the same. There are property bubbles and equity-market bubbles and LBO bubbles everywhere.
So unfortunately, when the music stops, it's not just tech that'll have a cold spell; it'll be everyone. This time it's a bubble but not a tech bubble; this time it's different...
I can also gauge the tech bubble by the flow of dinner, drinks and other social invitations in my inbox. The P.T.A. at my daughter's school is hosting a really neat fundraiser this week in San Francisco, the kind of event that appeals to an audience far beyond our school community. I personally know of no fewer than four other significant functions happening that night elsewhere in San Francisco, and that's not counting straight-ahead business functions. I could easily dine out four nights a week on the dime of some public relations firm that is hosting a dinner in an attempt to drum up publicity for its client. And I'm not invited to nearly the number of swanky gatherings that my younger, more receptive colleagues are.
http://tech.fortune.cnn.com/2014/05/08/yes-were-in-a-tech-bubble-heres-how-i-know-it/