I agree with you, all signs pretty much look like bubble 2.0.
On the other hand, the interesting question arises when is the right moment to sell?
For me $750m would be more than enough, although it is hard to tell once you are in this situation. If you (as a DFJ apostle) have not already read the following article about the early days of Hotmail, it nicely illustrates how small the gap between luck and greatness is: http://www.wired.com/wired/archive/6.12/hotmale.html?pg=1&topic=&topic_set=