[eth]

Of course. That's kind of what HN is, right? Same with Techmeme and their associated properties.

I am a huge fan of niche focused aggregators. Reddit is cool, but there are so many subs and it's easy to get distracted by jumping around. Any specific niche you are thinking about?

[naf]

I'm actually thinking about a celebrity/gossip niche. It would be fun to just read articles and watch pictures/videos of a certain celebrity, without visiting multiple websites. I just don't have a clue how an aggregator is build. Do I have to build a crawler or can I just use the RSS feeds of certain websites?

[iKnowKungFoo]

The sites I mentioned just aggregate the RSS feeds from other sites.