These screenshots were taken from the Ubuntu daily LiveCD spin on the 30th of September. As you can see, there is a new default wallpaper but beyond that there is pretty much the standard Ubuntu Human theme. We feel at least that this wallpaper is a regression in Ubuntu's artwork and much better alternatives can be found on the Ubuntu art mailing list and elsewhere. Other artwork proposals can also be found on the Ubuntu Intrepid Artwork Wiki.
The Ubuntu 8.10 "Intrepid Ibex" Beta release is expected this Thursday, October 2nd. It will feature the GNOME 2.24 packages and various other enhancements.