natural text / human text analysis

Hi.. I'm building a newsscraper -> portal. Fetching, parsing and storing many links to news items per hour was not much of a problem. Translations between languages can be done via google, so that wont be much of a problem either i suspect. I dont want to reveal too much of my business idea, but i do need to do text-analysis, to group related items, and make "suggestions" lists. I've had a dabble with creating my own ontology structure (kinda like a dictionary + thesaurus datamodel) by scraping existing ontology websites, but needless to say natural text analysis is a huge field. One that i'm a total noob in. So in the first place, I'm looking for any free/paid useful existing data-mining / text-analysis code that can be run easily from php. TBH i dont even know my feature-requirements really, i'm interested to know what's available. In the second place, i'm looking for free and published-for-a-cost data-mining / text-analysis papers/books that explain how to produce useful results. Thanks for your input.