Sigh... That would not be a "feature". That would be an entirely new UI, new window-manager, desktop, whatever. We've been there. CSSU is about fixing bugs, making things faster and hopefully more stable. It will not bring you Android Browser, Flash 10.3, steroscopic 3D screen and built-in laser with Evil Masterplan app. CSSU is something that will (in time) be pushed to all N900 (who is willing to update). It wont force you to download 2 gigs of cr@pware, that you don't know about and probably will never use. Like a new UI. Now making it as a separate project would be interesting, that I agree.