The Connections 2011 interdisciplinary wargaming conference was recently held at NDU.

Connections is the only national conference dedicated specifically to wargaming. Since 1993 Connections has worked to advance the art, science and application of wargaming by bringing together all elements of the field (military, commercial and academic) so participants can exchange info on achievements, best practices and needs.
As might be expected, there was much discussion of things COIN.

The agenda is available at the link above. Brant live-blogged the proceedings during the event at Grog News, and I have an after action review at PAXsims.

Side note: Andean Abyss (still in development) seems likely to emerge as my favourite COIN-themed commercial wargame to date.