Just going through A Random Walk Through Wall Street right now, and there's no doubt that, by the tone of that book (and specifically Robert Shiller's quote of a "positive feedback loop), we are in a bubble.
The questions really ought to be:
1 When will it burst
2 How hard will it burst (I think this'll be the main difference with the dotcom bubble)
The questions really ought to be:
1 When will it burst
2 How hard will it burst (I think this'll be the main difference with the dotcom bubble)
3 Which companies will come out of it