The hardest thing I can see in creating something like this on first glance is the Cl*ickBank portion. Last I checked they don't provide rss feeds of their catalog, only some form of giant daily data dump that would need to be converted into rss and then parsed for use. I looked into that a long time ago and it seemed like more hassle then it was worth to me, but then again I think CB products are 99% garbage and don't promote much from them, so I could be biased.

For everything else though, eb4y, Am4z0n, news, images, videos, articles and etc. getting keyword based rss feeds is easy, you just need ways to parse those feeds into on-page content, and there are a bunch of free snippets in javascript, PHP and ASP out there if you can't code from scratch.

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