Human Rights First does a video interviewing New Yorkers near Foley Square about the trial of Ahmed Khalfan Ghailani, a former Gitmo detainee who is charged in connection with the 1998 U.S. Embassy bombings in Kenya and Tanzania. The video pokes fun at conservatives for suggesting a civilian trial of the alleged 9/11 plotters would be a disaster, given that there doesn't appear to be a need to scale up security in advance of Ghailani's trial.
That said, a trial of Khalid Sheik Mohammed and others would be considerably more high profile and probably require substantially more security, although I think Glenn Greenwald's right that objecting to a civilian trial because of the cost or security challenges is pretty much the definition of surrendering to terrorism.