Building ad-hoc breaking-news pages

What would be cool would be to create pages on the fly that bring up the latest Boston-area postings on breaking news (think gay marriage, the DNC, the February blizzard, etc.).

Drupal has a "news page" module for just that purpose - enter a keyword and the module checks incoming RSS items for it and then posts. Only problem: It works on a per-category basis. So I've created an "All" category and have been adding existing blogs into it, in addition to whatever real categories they belong in.

Now all we need is a big news story to test it out on. ...