Reuters: ValueClick Buys All Its Shares Held by DoubleClick

First Accipiter buying its way out of Engage, now this. Wasn't this supposed to be the era of consolidation? Strangely at @d:tech, I noticed the realm of ad networks and ad serving solutions seems, if anything, to be getting more crowded: Accipiter, FastClick, A-Ha, Avenue A, Zedo, BlueStreak, SpinBox, ValueAds, Burst, Advertising.com… Can today's market really still support all this?