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Useful reference links. Many thanks, Mike.

Hello Warren, The more you think about this the more likely you are to get yourself in trouble with Google. Just write informatively and naturally, with the goal of converting the visitor, and you should be fine. I know this advice sounds like it's brushing off the question, but it's not. If you start putting keywords like "los angeles widget" and "strong green widget florida" into the copy you're going to ruin your chances of ranking well in the long-term... Likewise if you start creating geographic targeted doorway pages. Both of these tactics are against Google's Webmaster Guidelines and are pretty easy for them to spot. I would take these "long tail" keywords and group them by topic. For example: Widgets (size) Widgets (strength) Widgets (location) Then I would total up the search volume for each "set" of long tail keywords. If it looks like it might be worthwhile to create content, then put up a page for each set and use the variations naturally. Don't worry if you can't use them all exactly. Google gave you the data so you can assume they already know the semantic relationships between the phrases - thus, you don't need to put them all in there. Search for "Cheap Widget" and you'll see results for "Inexpensive Widgets".  Make sense? If you do create these topical pages just be sure that they are valuable to the visitor. If they're not you could harm your site.