I played a few hours of Project Argo, and I gotta say, I like it a lot. It's got a lot of potential to break the barrier between full-on military sim and casual FPS. I didn't see any guides out there explaining the basics of Project Argo, so I spent some time editing my gameplay footage into a little "how to" guide. Check it out, maybe show it to a friend if you want to get them interested in playing.
I still need to put in more hours, but I'll be back here with constructive criticism as soon as possible!