the kde-artists.org forum is also going gangbusters. we're working on various elements, including the new extenders. here's one artist's rendition:
we're not spending time on colour choices and what not at this point, but rather general design and interaction. in one such discussion it occurred to me that what we are doing, really, is industrial design even if we haven't said so explicity. form follows fuction, but it has to look sexy too; so we put graphic designers together with technicians and usability folk to achieve that goal. it was one of those "obvious!" forehead slapping moments, really, but now i have way to clearly describe what the heck it is we're trying to do here with Plasma =)
and i must say that it's really nice to be designing these elements with artists prior to actually coding things up. with the back and forth interaction, it's helping me visualize what we'll be aiming for and what the requirements in the APIs will need to be. not only will Plasma look better for it, but the code will be better too.
i heartily recommend this process to anybody who is doing KDE development involving visual or highly interactive elements as a key component.