Best pay-per-click affiliate program?

Please tell me which you think is the best PAY-PER-CLICK affiliate program.

I want to maximise ad revenue for my website.Please list the price per click and their website.

Thanks

Overture Pay Per Click

I've tried Overture Pay Per Click for the last month now but the thing that strikes me is I have no way of tracking sales per keyword. I have affiliate software which *could* do this but it would mean an affliate account for each keyword/phrase which would be ludicrous bearing in mind I am experimenting with about 20 to 30 keyword phrases and possibly looking at other Pay Per Click engines. Is there a recommended script that will do this (free or otherwise). What I'm looking for is software/script that will tell me Overture made a total of X in Y month, with a breakdown of each keyword/phrase sales. Any suggestions?

some opinion on a comparison

I would like of pay per click advertising as compared to fixed daily rate advertising:
With pay per click advertsing, ads are targeted at users who enter specific keywords on search engines. When the user responds and click on the ad, the advertiser is charged a fee for the traffic.
With fixed daily rate advertising, the advertiser pays a fixed daily rate for a specific period of time only and not for the amount of times users click through on his ad. In this case the ad can also be keyword targeted.

I've tried Overture Pay Per Click for the last month

I've tried Overture Pay Per Click for the last month now but the thing that strikes me is I have no way of tracking sales per keyword. I have affiliate software which *could* do this but it would mean an affliate account for each keyword/phrase which would be ludicrous bearing in mind I am experimenting with about 20 to 30 keyword phrases and possibly looking at other Pay Per Click engines. Is there a recommended script that will do this (free or otherwise). What I'm looking for is software/script that will tell me Overture made a total of X in Y month, with a breakdown of each keyword/phrase sales. Any suggestions?

new Pay Per Click Gambling industry targeted search engine!

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