Zowie! AOL's bought Tacoda, the ad-network/targeting business that Dave Morgan started in 2001 and built into a powerful service.

This on the heels of the OpsWare acquisition, the Google/ DoubleClick for Microsoft/aQuantive, Yahoo!/Right Media and WPP Group 24/7 Real Media buys.

Bonus: Ex-AOLer Jeremy Liew on content sites and ad networks.