Avant Browser - Free Tabbed Interface for IE - Available NOW!
I can imagine the marketing.
"Internet Explorer 7 now features the ability to browse multiple webpages in one window! Instead of grouping different windows in the taskbar, Internet Explorer 7's advanced features allow you to display different webpages within the same window, thanks to its integration in the core operating system!"
"Want a change? Take advantage of the same powerful graphics engine that allows Windows XP to display three different color schemes and download matching appearances for Internet Explorer! This feature could only be made possible by Internet Explorer's tightly-bound integration with Windows XP."