I think it's looking really good and there is no doubt that Zipper is really focusing on polish and adding those last touches to make the campaign stand out more than any SOCOM game in the past.
Also, according to this week's Zipline Episode 18, Zipper is working on a documentary about the history of the SOCOM franchise, something I find VERY interesting. If you aren't already aware, I currently working at a major television news station up here in Canada, and went to school for video production. As someone big into videogames and video production, I've always loved watching those "behind-the-scenes" videos found in many videogame collectors discs. So that fact that one is being done on SOCOM is very appealing to me.
Apparently it will be posted to the SOCOM Blog once its finished, but for now there doesn't seem to be any real time frame for it. Regardless, keep an eye open for that.