While I haven't really been following the various investigations of Palin, I understand that the majority of them (if not all) to date have come up with nothing.
It will be interesting to see what this one dredges up.
Personally, I think there should be a new “Department of Corruption Elimination”, or some such. They should be tasked with investigating all members of the government bi-yearly for any possible corruption.
Of course, that would likely take half the current federal budget to implement…