Beppe Grillo and thousands of others Italians (including me) have bought a page on the International Herald Tribune to inform about and protest against the 23 members of the parliament that have been convicted of a variety of crimes (including corruption) and yet are allowed to sit in the Parliament.
Recently he has been interviewed by the BBC concerning the reasons of this protests. You can hear the interview here. Here is the list containing the 23 names of the member of the Parliament with the indication of their charges.