One of them, apparently, used to be used by the CEO, and had Flock installed on it. This was my first introduction to the browser.
A dedicated browser for social networking like Flock always seemed superfluous to me. The recommendations of the Flock project point at this: use other free browsers (preferably FF) with the appropriate extensions.
Does RockMelt have a business model? dunno. But RockMelt solves the pain of twitter/facebook/linkedin fire hoses (for me)
Edit: Nevermind. I didn't realize that Flock 3.0 moved to webkit.
"Wanted to destroy something beautiful" - http://factoryjoe.com/blog/2005/12/29/wanted-to-destroy-some...
They're using the WebKit rendering engine. While Chrome is a great browser, I'd hardly say it was "made from scratch".