Other than the excellent post over at Tigerhawk, reprising Bill Roggio's commentary of a few months ago, I haven't seen anyone mention the loss of trust that the Al Qeada network must now have.
Someone - multiple people most likely - gave up information that led to Zarqawi's location. Who are they? I don't necessarily need to know, but the many competitors for the vacant slot are sure curious about it. Everyone wonders who they can safely talk to now.
A great victory today, on the psychological more than the military side.