Obviously, we'll have to wait to find out what further slime has to float to the surface.
My imagination doesn't run to the depths the News of the World seems to plumb so effortlessly. Political dirty tricks, bridery, corruption and blackmailing MPs / cabinet ministers for information and / or dirt on their colleagues is about as far as I can go. Though that would certainly be nice and sleazy.
Worth noting that the much maligned Labour MP Tom Watson has been asking awkward questions about the News of the World and phone hacking for years (2). The same Tom Watson who was falsely smeared by untrue association with the Damian McBride-Red Rag scandal back in 2009.
It was the Mail on Sunday - another close friend of phone-hacking detective Steve Whittamore (3) - that first made the phony link between Watson and McBride, but The Sun also publicised the story and was successfully sued, paying substantial damages to Mr Watson for libeling him. The Sun and The News Of The World are both owned by Murdoch. Just a coincidence, I'm sure.
1 - "The worst is yet to come, Brooks tells journalists as they ask searching questions about paper's demise," by Tamara Cohen. Published in The Daily Mail, 9th of July, 2011. (http://www.dailymail.co.uk/news/article-2012766/Rebekah-Brooks-tells-News-World-journalists-worst-come.html#ixzz1RaZT0DCE)
2 - "Profile: Labour MP Tom Watson," by Victoria King. Published by the BBC, 6th of July, 2011. (http://www.bbc.co.uk/news/uk-politics-14043436)
3 - As described previously on lefthandpalm: http://lefthandpalm.blogspot.com/2011/07/should-mail-be-next.html