If what you are doing is essentially a diff for news, then you might be onto something very interesting.
The way news are consumed is currently tiered by the temporal interval which they cover: breaking news, daily news, weekly, monthly, annual summaries. A diff for news can help process the different tiers from a single reader, without the "breaking news" tier taking over.
At its core, the essential work is to detect changes important to the user. Adding summarization techniques to further weed out the noise would be a very important improvement.
Maybe I'll give it a try, I use http://www.changedetection.com/ for some pages I like to monitor (typically job sites) but it works only if you can clearly address the page you want to monitor
The way news are consumed is currently tiered by the temporal interval which they cover: breaking news, daily news, weekly, monthly, annual summaries. A diff for news can help process the different tiers from a single reader, without the "breaking news" tier taking over.