BlenderNation provides a list of six YouTuber videos posted by developers of Blender 2.5. The list is available here.
Please be aware you aren’t even seeing an actual interface as of yet. I’d like to repeat these are development demos. Nothing beautiful, not concrete and hardly visually complete. Lets not form opinions until we see some real visual elements. The developers know what the community wants and we know they will do their best to ensure that all are properly satisfied to the best their abilities. Enjoy the videos!