I received the same communication about the Jamie Leigh Jones case this morning (entitled "Rape and Halliburtion" and distributed by MoveOn.org).

I immediately signed the online petition, of course, and if you'd like to do the same, here's a link:

http://pol.moveon.org/contractors_accountable/o.pl?id=11800-6555553-ae19B_&t=3

The Suzanne Swift case involves a bit of ambiguity, but this one is pretty clear-cut. Mercenaries acting at the behest of the executive branch should not be immune to US law. (Probably deserves its own thread, eventually, but I'm "not going there" just now...)