Plan 9 brings up something that I had never really considered in the SR setting - The UN. I would have thought that particular organization dead and gone or at least completely irrelevant. How much power does the UN wield in the 2070's?
Ironically, slightly more than it does today, which isn't saying much.
The UN has become a tool for the Corporate Court to deal with Governments that aren't playing ball, but haven't done enough to warrant destroying their economy completely (Or it's not cost effective to do so.). UN forces still provide humanitarian aid in areas that have suffered extreme situations, and still operates it's Peacekeeper force drawn from it's various members military units.
You can find a reference to this in Arsenal:
FN P93 Praetor: The P93 is a bullpup submachine gun developed for the Corporate Court-controlled United Nations peacekeeping forces. During the riots following the Second Matrix Crash in 2064, it became obvious that many of the so called “blue helmets” were ill-equipped for military riot-suppression operations...
It's also a very nice looking SMG with decent stats.
Other than that, the UN is just like the Corporate Court, trying to keep the peace between inherently belligerent groups, some of whom have military forces or more than enough funds to hire Shadowrunners.