There's a BBC News Online piece about Flock.
But for the first decade of web browsing it's been just like that. You can read webpages but only if there are special add-ons can you interact with them.
What? Blogging tools that use web standards have existed for years.
Now somebody has launched a web browser that is designed to let you write to the web just as easily as you read it.
Most web browsers are designed to let you do this. Whilst Flock is a another good browser, it seems to me that it's hardly as revolutionary as this article suggests.