I'm not saying this because I'm a Linux user and developer, but i LOVE OpenMoko mockup interface so far. It reminds me of my favorite Window manager, Enlightenment with its brushed metal background and such. Looking at OpenMoko, makes me wanting iPhone less and less (well i prefer open source over anything, any day) and i cant wait to dig in and make some hacks and application for this smartphone. Enjoy the screenshots of the OpenMoko interface.
Photo above is taken during exclusive party in Vegas where i met Sean from OpenMoko.