That's what aggregators do. According to your paradigms, aggregators pull information from blogs and websites you've designated and compiles those entries chronologically with a brief summary/intro to the post.
Aggregators are also called readers, the most popular being, of course Google Reader.
There are several types of readers or aggregators:
- News aggregator, a computer software or website that aggregates news from other news sources.
- Poll aggregator, a website that aggregates polling data for upcoming elections.
- Review aggregator, a website that aggregates reviews for movies.
- Video aggregator, a website that collects and organizes online movie sources.
- Search aggregator, software that runs on a user's computer and fetches, filters, and organizes a specific search from various search engines.