[Via Mark Harrison]

Microsoft has introduced tabbed browsing to its existing Internet Explorer 6 browser ... the facility comes with the new MSN Search Toolbar made available this week.

To download the toolbar look here:
http://toolbar.msn.com/?FORM=TOOLBAR

Help on how to use the new feature:
http://search.msn.com/docs/toolbar.aspx?t=MSNTbar_CONC_AboutTabbedBrowsing.htm