Mark great idea here is my experience along that line with integration. I have used that style of pull for years on my site directory with cgi scripts. Biggest problem is the constant changes from amazon. Every time they changed it broke the script which sucked. Might be easier to add that in a custom header or footer. Or as a separate addon for the amazon feature.
Perhaps some more info on how you generate the links from amazon would help. If you plan on using the generic 5% links it wouldn't be as much trouble to keep up to date as trying to keep the 15% clickable links current.
Personally I would prefer amazon as a addon that we might intergrate better with the forums.
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