The Google of Europe?
reuters.com
reuters.com
They don't have the same significance as Google. What they have is a content creators(1-5% of english(?) net users?) nice-to-have tool and Google has a essential search(+ more) for everyone(~100% of users).
In my opinion a lot better than any of the YCombinator startups yet. It has a cool (non-trivial) technology underneath and it actually brings value.
edit: About it being the next Google - granted it is far from being the next Google, but I can see it being very sucessful.
Currently it only support a few blogging platforms, but I believe Joomla and other CMS support is also coming, as well as an API.