For Australis UI please use Tab Groups Button.
Adds a menu to the menubar and the panorama button showing all tabs grouped by tabgroups (panorama/tabcandy groups).
Right click on group name to delete/rename group.
Drag tab to move it between groups.
Right click on tab to mark it (Ctrl+Click to mark multiple tab for ver. 0.8 up), then drag to move multiple tabs.
Middle click on tab to close it.
Add tabview button to the toolbar for button with drop-down version.
Addon preference can be configured by options dialog (since ver. 0.7).
Latest (unreviewed) version: http://code.google.com/p/tabgroupsmenu/downloads/list
* Can create a group as subgroup of another group (i.e. it appears as a submenu of another group), only works in this extension menu though.
* Context menu for groups and tabs
* Can drag a group to another group (to make it a subgroup of another group)
* Options dialog
* A new menu (tabs menu) for showing the tabs from current group
Ver. 0.8.2.5: if there are more than one anoymous group (group without title), then only one if them is being shown. Either you can wait for ver. 0.8.2.6 reviewed or install from above link.