Useful links and other resources about the topic of Conversion Tracking
 

• Find out more about Conversion Tracking and adwords at Google
• See this article on "New Conversion Tracking Tools Offered by Both Overture and Google"
• See this press release at PRWeb
• See Conversion tracking tools at Stuff You Might Like
• See more information on Overture's Conversion Counter

Tracking services provided by search engines
 
A lot of the bigger search engines provide conversion tracking services allowing you to see how effectively they referred traffic to your site. One disadvantage of these services are that they can only provide information about the traffic that they referred to your site.