I wanted to point out a few things that were helpful.

First of a plugin from Redfly marketing that helps to choose country and language within Google.
here was an article on how I use it – http://fieldsmarshall.com/2007/08/24/google-adwords-helper-firefox-extension/

Also I have looked around a lot for proxy servers for actually testing offers..

I had one potentially very profitable campaign that was plagued with a server problem. I was experiencing strange results with my cost per conversion and the only way to test it was with a proxy server. Sad to say I had to drop it while they hopefully sort out there server issues. It was a big market and I was one of the first

If you have looked for proxy servers it can be a pain needless to say ..

Here is one service that looks promising http://www.pickaproxy.com/ use the TOR network and
Hide The IP 2.1.1 – simplifies the whole process of choosing a proxy in a country

Also http://www.aliveproxy.com/ looked promising as well

Note I have no affiliation with any of these services.

One of my problems in the Spanish language market is that there are limited products to promote and buying things online is not as popular.

As you mentioned I may need to investigate creating my own products.

When it makes sense for reagular companies why not mine, I am running some offers for canada and australia, now is the time to cross the pond and enjoy the exchange power of UK.