According to reports now hitting the wires (for example, read here and here) US forces surrounded a house containing eight senior al-Qaida members, most of whom detonated themselves to avoid capture. There is reason to believe, but no confirmation yet, that Abu Musab al-Zarqawi was one of them.
Combined with the continued success of Operation Steel Curtain and Zarqawi's being made outcast from his own clan, prudent onlookers can conclude that we have long since passed the point of inevitable victory in Iraq. That victory will not be painless—as Churchill reminded the US Congress during World War 2, more Union soldiers died after Gettysburg than before, though the end was no longer in doubt—but it will come, unless we choose to quit the field and let the enemy win by default.
Be steadfast, America. Hold on to your weapons for just a little longer.
For a little perspective, check out the devastating political cartoons of Dr. Seuss during World War 2. Many of them could easily have been ripped out of today's headlines.