How can I determine trending stories from a collection of news data

I have a portal that fetches news from hundreds of resources around the web. How can I be able to use开发者_C百科 these data to determine trending stories ?

Any ideas would be highly appreciated.

Thanks.

1. Get a good dictionary with all kinds of words and their forms.
2. Split the words in a news story and collect statistics on those words.
3. Group stories by their word statistics signature and closeness in date-time space.