Nick yep, most of the half decent trade scripts around atm will allow you to geo filter the traffic.
There are even a couple that will allow you to filter it based on the referring url.
The problem with such a broad sweeping statement.. google, tgp, skimmed is that for some, google traffic converts less than tgp traffic.
If a webhamster doesnt know how to successfully market most types of traffic they find themselves catering their business to the single traffic source they can successfully market to and, more often than not, this is TGP traffic
