I hear you =) Here's a quote from the email (Dec 7th 2006):
Thanks for following up with us and removing the phrase "The more you search the more we give".
Unfortunately, we’re still unable to approve your application for the AdSense program because we found that you are offering incentives to users to perform searches in order to benefit third-parties. This activity is prohibited by AdSense program policies.
AdSense does not currently permit sites that offer financial incentives to users to perform searches. This includes both direct incentives ("we pay you two cents for every search") and indirect incentives to third-parties ("we donate to charity every time you search"). There are a number of reasons for this policy decision, most notably our inability to verify the accuracy of any claims. While we have no doubt that you intend to donate a portion of proceeds to the charities listed on your site, we have no way to verify this with all partners.
For additional questions, I'd encourage you to visit the AdSense Help Center (http://www.google.com/adsense_help), our complete resource center for all AdSense topics. Alternatively, feel free to post your question on the forum just for AdSense publishers: the AdSense Help Group (http://groups.google.com/group/adsense-help).