Just after reading a famous blog, I know that Lubuntu (LXDE based Ubuntu) 10.10 Maverick Meerkat Alpha2 has released to download with some new artwork and theme. Lubuntu is an unoffcial flavor of Ubuntu. New changes are seen all elements in Lubuntu, such: Wallpaper, backgrounds (panel and menu), splash image (LXDM and logout dialog banner), Lubuntu menu logo and in the Openbox theme.
In this moment you can not get new theme in downloadable ISO CD. They only get this who are using lubuntu via desktop ppa.
Here I am publishing some Lubuntu 10.10 (Maverick Meercat) alpha 2 screenshots. All are taken from famous techblog webupd8.
More news at Lubuntu site.