Swimming with Sharks, part 4: 'We had Bono stay at our house last week'

Today, we wrap up our four-part audience with the Sharks of ABC's Shark Tank, which airs tonight at 8 p.m. Eastern.

When WalletPop's Jason Cochran dares to ask the Sharks if they secretly collude to trick entrepreneurs into devaluing their own businesses, Barbara has some pointed words about it. Also, is it really worth a multi-millionaire's time to use Twitter? And guess who just had Bono out to the house?

We've talked to all five Sharks. You can catch up on our video interviews with them, and with entrepreneurs from the show, at our AfterShark Page: www.dailyfinance.com/after-shark-tank.

Here's part one of our interview series:

Part two of our series, in which the Sharks explain why you need them to make money fast:

Part three, in which Barbara Corcoran talks about the art of self-promotion (and her colleagues' "trophy wives"):