keywords

Hi,
Is there any module (or custom code) to help me to achieve the next thing:
I have a landing page and I would like to use visibility rules depending on the keyword used on search engine or the referrer url,

i have found this module CTools HTTP Header Plugins but the maintainer doesn't answer to the issue queue for long, and I don't really know if this module can help me to achieve this.

Hi guys,

I am a bit lost and need your advise. I want to be able to simply filter all feeds by my keywords.

In other words, if I subscribe to many many news feeds (let say all available RSS feeds from a many many websites), I do not really wanna read all that stuff. Instead I would just like to set up my own keywords and filter or delete the rest of the feeds downloaded from all these websites.

I am using drupal 6. I have check already built-in module "aggregator" and "aggregation" module - it is not possible, right?

Thank you for advise.