About the browser:

"But unlike many of its peers, Midori is also fully native to elementary, using the same GTK toolkit that ensures the perfect desktop compatibility and integration found in our other apps."

So apparently it's GTK-based.

Sourceforge repo: http://sourceforge.net/projects/elementaryos/

it's just Ubuntu with a new theme and some new default apps.

looks like plain gnome + docky with a clean theme, that's about it.. Another linux distro which tries to have a simple and clean interface.

I will install the mail program postler on ubuntu and give it a try, though.