While using Ubuntu 8.10 Intrepid Ibex Beta i was able to use the new features in the Nautilus file manager. The first change to Nautilus that i noticed while using Ubuntu 8.10 Beta was the large Eject icon that appears next to mounted devices in the Places window to the left side of Nautilus. Clicking on the Eject icon unmounts the device while clicking on the device will mount it again. I found this to be quite useful and a quickway to mount and unmount devices in Ubuntu 8.10.
The Natutilus file manager also includes easy to add, tabbed browsing. Now you can have multiple folders open in separate tabs. Create a new tab in Nautilus file manager y selecting File — New Tab or pressing (Ctrl + T). By right clicking on the tabs you can move them left and right or close the tab.
Here’s a short video depicting these new features for the Ubuntu 8.10 Intrepid Ibex desktop.