Internet Explorer 7 provides improved navigation through tabbed browsing, web search right from the toolbar, advanced printing, easy discovery, and reading and subscription to RSS feeds. It is optimized for Yahoo!, with 2 home pages: Yahoo! & Yahoo! News, Yahoo! Search as your default, and Yahoo! Toolbar. It is also simpler to get around with a new streamlined design along with faster and more organized surfing with Tabs. Moreover, you can keep your IE6 favorites and bookmarks they'll come along with you.
Editor's review of Internet Explorer for Yahoo

Yahoo members should leap at the chance to download this handy freeware that packages all of Yahoo's services into an attractive toolbar.

Internet Explorer for Yahoo's interface can be customized to your liking through the Options menu, but you have to be signed in to Yahoo before you can make any changes. Once you're signed in, you can choose from a huge variety of buttons that are broken down by subject. Since this toolbar is brought to you by Yahoo, all of the buttons take you to Yahoo-related sites. Any changes we made to the toolbar immediately took effect once we applied them. Internet Explorer for Yahoo does have all of the standard features of similar toolbars such as a pop-up blocker, e-mail notification, and a highlighter, and all of them worked perfectly. Each link took us directly to the corresponding site without hesitation. The built-in bookmark manager rivals some of the best managers out there, making it incredibly easy for us to keep our favorite links neatly organized.

There's a lot to love with this toolbar, and it's all offered free of charge. Yahoo members will find this to be an essential toolbar for their Internet Explorer.