There is so much going on in terms of announcements and acquisitions these days. I suspect that the actual number of people affected is smaller than the last big bubble of the late 1990’s.
Still, I think I have some good rules of thumb to help detect it.
If you start going to parties/recruiting events and receive free iPod shuffles… you know the bubble is back.
If they start giving out iPod nano’s, then you know the bubble is about to burst 🙂