I'm assuming he's referencing the Iranian involvement with Sadr as well as the 300 or so well-organized fighters that our troops fought off at Qaim recently. Both of these incidents are more or less acts of war if we truly want to be technical about it.
Freeper Wretchard’s blog called attention to significant action along the Syrian border that has drawn scant attention in the major news media:
http://www.freerepublic.com/focus/f-news/1119855/posts And that was lent some support in this post:
http://www.freerepublic.com/focus/f-news/1120537/posts It would seem that quite a bit has been going on more or less behind the scenes.
For Angeles Errare: That is indeed what I was thinking of. "Secret war" may be over stating the reality, but IMHO the media calling recent events an Iraqi "insurgency" is perhaps understating the situation in that it totally glosses over what appears to be significant foreign involvement.