This is not just for bloggers: it is (or better will be) also for anyone publishing content on the web. Newspapers are moving (or better, moved) to the internet. This can bring a lot of value(reduce costs) to big companies so it is a valuable startup.

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.