To start, Glenn Morshower has updated his website noting his role on "the upcoming Transformers 3." Considering that the Chicago videos have demonstrated that NEST plays a prominent part in a lot of the action, to me the only real question is does his character of General Morshower join in on the front lines or continue to command behind the scenes. Thanks to Chris for the link.
The next bit of news comes from a baseball cap store website. According to StricklyFitteds.com, "Hardcore Eddie kills Starscream." This info comes from a blog post on the website with pictures from Lester Speigh (Gears of War) who plays Eddie, a probable member of NEST. In a separate video post (below), clearly taken right in the middle of production at the North Michigan Avenue Bridge, Speigh talks about the website's hats and ends with "I got to go kill some Decepticons." If the rumor of Megatron's death is true, it is safe to say the rest of the core Decepticon cast follows (otherwise just repeating the end of TF1) so not surprised if Starscream dies. What would surprise me is if an unknown single NEST member did it. I suspect that a NEST group with Eddie does participate in taking out Starscream but the kill shot is probably left to Epps or Lennox. Thanks to DJ Bigtyme Beats and John for the link.
Last but not least, Sam has posted the third part of his behind the scenes videos taken along Wacker Drive on July 26th and 27th. The 3 videos show lots of the behind the scenes prep that goes into the filming. At the time it was for bits involving filming for scenes involving Hotchkiss Gould Investments (aka the 7/11) and with the required Bayhem. Part 3 is below. It mostly shows some upside down Bus prep, and helicopter action. If interested in the rest of the series, Part 1 shows off the Decepticon Armored Car and more while Part 2 involves the "police" prep and response to a TF3 related event.