While it's true that some apps that utilize the Internet Explorer engine (Netcaptor, Avant Browser, etc) offer tabbed browsing, the actual IE browser doesn't. That was until today, sort of. Now, if and only if you use the MSN Search Toolbar, tabs are available. This sounds like a stop gap measure until IE 7 is released. More info on MSN Search's WebLog. A screen cap is available from BetaNews.
Optimising Digital Marketing Campaigns with Search, Social and Analytics
At SES London (9-11 Feb) you'll get an overview of the latest tools, tips, and tactics in Paid, Owned, Earned, Integrated Media and Business Intelligence to streamline your marketing campaigns in 2015. Register by 31 October to take advantage of Early Bird Rates.