Microsoft has just released Internet Explorer 7 - Beta 3.  The IE homepage has yet to be updated, but you can pick up the download at Microsoft download site.

Internet Explorer 7 (IE7) Beta 3 has been designed to make everyday tasks easier, provide dynamic security protection and improve the development platform and manageability. End user improvements include a streamlined interface, tabbed browsing, printing advances, improved search functionality, instant feeds (RSS), dynamic security protection, and more.