On Johnnys-web they have a special section for troublemaker and are going to post messages from each of the members. So far they only have Nino and Aiba up, but I translated the messages on my journal and thought some people might be interested. I will update with the other 3 messages once they are up, probably over the next 3 days.
If you are interested you can read the them here...
Btw, it seems like they all wrote these messages on the day they filmed the PV :D