But do they do that for ANY feed? Or just for the ones you are subscribed to? Because I need archives to any feed, not just the ones I follow...

It's true though that google seems to be catching feeds :). Nice.

I wonder if there's a way to search for a particular feed. Otherwise, I'd have to create an account and subscribe to all feeds in the world O_0.

Where is the non-official API, anyway?

Thanks!