roitracker - 5:32 pm on Aug 7, 2003 (gmt 0)

With Overture, I can track each keywork like: ....com/?source=overture_keyphrase

You can do this with AdWords too (power posting).

Tracking is essential, but by puting your keywords into your links (whether on overture, adwords, or another PPC provider), you're making it pretty easy for your competitors to find out the exact keyword phrases you're targeting.