Ubuntu 9.10 (releasing October 2009) would be named as Karmic Koala!
The release is expected to boost startup performance on the desktop. Boot performance and beautification will be focussed and target boot time for Jaunty (9.04) is 25 seconds and this would be improved even further for 9.10. They might also adopt Red Hat's Plymouth framework to give flicker free animation. One could probably expect inclusion of Ubuntu's experimental face browser login screen.
And maybe, we could get a non-brown look finally!