I've built a news aggregator based upon pubsubhubbub, running on appengine. It's an experiment project started far away in 08', but I gave it up as I cannot see any value a simple feed aggregator could provide, and it was ugly, technically.

When later Google added new apis, like cron/queue tasks, and there is new pubsubhubbub. Then I thought: let me scratch it, and build around these new stuff. And here I am, it's technically superior now, at least.

I still see no much value here, but i'll try this time. I'm gonna aggregate startup blogs, so please suggest some. Your time appreciated.

It will be released before FIFA world cup. And the source will be open later, if you're interested.

Thanks!