Below are screenshots I took after I installed Ubuntu 8.10 Beta on a separate partition of 10 GB, on an my Intel Core 2 Duo 1.8 GHz PC with 1 GB DDRAM2. I took all the screenshots leaving default appearance and settings in applications, including the wallpaper, after I installed the nVIDIA restricted drivers and enabled Normal effects in System -> Preferences -> Appearance. Resolution is 1280x1024. I also performed a full apt-get update && apt-get dist-upgrade and restarted the computer before taking the screenshots, so the installation is more recent than the actual beta release.
Intrepid Ibex comes with GNOME 2.24, Firefox 3.0.3 and OpenOffice.org 2.4.1. The installed system occupies 2.4 GB after dist-upgrade and apt-get clean.
Rhythmbox music player
Totem movie player
Nautilus file manager
OpenOffice.org Writer word processor
Tomboy notes-taking application
GNOME Terminal shell-like application
Firefox web browser
Ubuntu Help Center
Pidgin IM and IRC client
Brasero CD/DVD burner
I can't say it behaves very well until enabling the desktop effects, below is a screenshot showing artefacts while fetching graphically the nVIDIA driver:
I found a bug here and there, especially regarding artefacts at drawing window decorations, but the final version did not arrive yet so no comments regarding those. I just hope for a good release.