I’m currently tracking a couple of Google Adwords campaigns using my LinkTrack account. This way I can see the exact keywords that are generating response from the campaign. Here’s what they look like in my account:
Linktrack
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We manage eCommerce sites. Can you also track the amount of the sale versus the cost of the PPC keyword/ad/campaign as you do in Google Adwords interface? Also, are conversions tracked by IP address or a cookie. (I find IP addresses to be more persistent and less often blocked than cookies.)