Love it. Hopefully I can make a contract for my favorite bookmark sync-thingy (Cloudtact). But love the design. And I just finished my Jolicloud/EOS mockup if you want to see it and give feedback. Keep up the good work.
Remind me the Gnome 3 applications mockups (button with text on the left). Gnome 3 and elementary have some HIG rules that seems to be the same. Good way to go, a lots of applications are now beautiful and simple