Generally, I believe that the term "keyword position" is a little different from your actual question. What you are interested in is the importance of the actual word order.
If you try for example in Google and search for "Hosting Chile" or "Chile Hosting" it will bring you a much bigger difference in number of results than when you make the same search in Yahoo. I do remember an article from one of the members of SEObook where he expresses the opinion that the word order does not seem to matter significantly and gave the recommendation of simply mixing up variations and permutations of the anchor text.
If you're talking about within the content itself then yes it does matter to an extent.
However the order the keywords and phrases come in within the page's metadata is much less important. Even though I tend to put the most important keywords / phrases first out of fear that I'm somehow wrong.
I suggest hosting chile because hosting is the keyword and chile is the country everyone who is looking for hosting in chile is searching only hosting chili not chili hosting due to keyword prominence.