Generic "Adwords Conversion Tracking" system needed

Is it just Google's own system that can track pageview value back to kw?

[new_shoes]

I have been looking extensively at Urchin, Webtrends and ClickTracks and they are all way too expensive for the simple functionality I need: a *generic* Google Adwords Conversion Tracking script/application.

Basically I need to be able to track organic and ppc traffic just like I can with "Adwords Conversion Tracking".

For every pageview I can specify revenue (since I sell advertisement)

Special pages means the user actually paid for something. E.g. if he ends up on user_paid.html is means he paid! And I can specify the value he spent there.

List total revenue by keyword and organic vs. ppc.

Scenario:
Visitor searches for "widgets", clicks on organic link. Visitor sees 11 pages. 5 of these pay me 1 cent and 6 of them pay me 0.5 cents. Then visitor pays $4 for a product.
Another visitor search for "widget", enters site and only sees one 1 cent page.

Revenue is displayed as:
"widget", organic.
- Visitors: 2
- Pageviews: 11
- Pageview revenue: (5*1cent + 1*1cent + 6*0.5cents) 9 cents.
- Pay revenue: $4
- Total revenue for keyword: $4.09.

This is pretty much what I can do with Adwords already using Google's own system, but I also want to track organic and Overture traffic in this way.

My choice so far is Urchin, but I cannot get it to register a value for each page viewed. Going through their ELF system is too cumbersome, but may prove the only way.

Do you know of any scripts or apps that can do this for me. Any of you have experience with Urchin doing this?

[new_shoes]

Thought I would share an update.

After careful consideration and endless testing, I went with Urchin 5.7 software version, using their ecommerce and campaign tracking modules. The solution uses their ELF2 payment logs.

When a user visits I create an "elf2 transaction" related to his session id or access his existing transaction by using his UTM cookie.

Then for each page that generates advertising revenue I create an "ELF2 item" with the worth and add this worth to the total worth of the transaction. Same in case of signup or rebill.

When user comes back, I get his transaction, update it and add new "items". I do not change the date of the original transaction, but load it into the elf2.log and run it again in Urchin. This will effectively overwrite the original entry with the new worth.

So for any given day in the past, I can see what users who, for example, came from google adwords, cost and how much they have made to date.

Perfect.

I should also note that the one thing Urchin can't do is show serious geographical data. They use .com to indicate the visitor is from the US! Can you believe it? They do promise to change this in 6.0 of the software version due out in March 2005.