This is something i've been working on today, it's _very_ beta right now, so if it breaks i apologise, i'll try not to fiddle around with it for the next few hours. The basic idea is that you enter in a few search terms and a developer token/key (obtained from the adwords site) and it estimates for you the amount of searches per day for that _exact_ term. If there's an interest in this i'll push the app further, the basic application of it is to evaluate the potential traffic that you can get from actual searches, rather than just adwords ads. tool URL is: http://meriden.syswear.com/
It don't think it's a good idea to host this script and make people use it, I think Google won't like that. Release your script to the public and make it available so we can download and host it on our own servers, that would fit the TOS