I am not normally a conspiracy theorist, but the first thing that crossed my mind was the whole crappy drama with techcrunch.
Have the founders discovered that there was a data leak - and, given their opinions on the matter - decided it better to quit than work with whoever made it happen?
I hope not (edit: because I was rooting for last.fm, not because I want it to be true).
I would say given the constraints on founders being tied to their companies, the turnaround for leaving is far greater than the length of the TC debacle.
(I work here, and have had no indication that the TC allegations are true)
all 3 founders leave at the same time, only two years after being acquired? there is more to this than simply leaving to do other things. founders of sites like last.fm don't just let their babies go so easily, acquisition or not (think myspace, facebook, bebo, etc.)
I would say that it is connected to the RIAA drama and CBS sending them user info. If they resigned because of that, then full props to them (they just owe TC one big apology).
If the data sharing with the RIAA did happen and they didn't resign - then shame on them.
I don't think all 3 leaving at the same time means anything. One would assume that they're probably great friends, and feel that their combined effort in a new project (when the time comes) is better than 1 or 2 going separate ways.
Have the founders discovered that there was a data leak - and, given their opinions on the matter - decided it better to quit than work with whoever made it happen?
I hope not (edit: because I was rooting for last.fm, not because I want it to be true).