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Microsoft Corp. today unveiled Internet Explorer 8, and posted links to what the company called "Beta 1 for developers." Anyone, however, can download and install the preview. (As did PC World's Melissa Perenson and Editor in Chief Harry McCracken.)

"I am pleased to announce that Beta 1 for developers is available now," said Dean Hachamovitch, the IE group's general manager, in a presentation from MIX08, a Microsoft Web development conference that opened today in Las Vegas, Nev.

According to the download page published early today, IE8 Beta 1 will be available in separate versions for Windows XP, Windows Vista, Windows Server 2003 and Windows Server 2008.

Although Hachamovitch pegged Beta 1 as fit for developers, there's nothing to stop the general public from downloading and installing the browser. "This beta release is available to everyone," Microsoft's download notes read, "but is primarily for Web developers and designers to test the new tools, layout engine, and programming enhancements."

New Features

Among the new features Microsoft touted in other sections of the sub-site dubbed "Internet Explorer 8 Readiness Toolkit," were tools called "WebSlices" and "Activities." The former somewhat resembles the "Web Clip" feature introduced in Apple Inc.'s Safari Mac OS X 10.5 "Leopard;" the latter appears to be a small-scale mash-up tool. Both will be developer-, not user-created.

WebSlices (IE8) and Web Clip (Safari) let users designate content within a page -- dynamically-updated stock prices, for example, -- and then monitor changes to that content. But while Safari's Web Clip lets users create desktop widgets for easier access, IE8's WebSlices only allows users to add them to the Favorites bar or to a new row below the browser's address bar. In other words, IE8 users must still click to see the content after they're notified that changes have occurred.

Activities, meanwhile, are pre-designed mash-ups that Microsoft and third-party sites and services will offer free of charge. A dedicated Activities page currently lists a dozen samples, ranging from one that helps users find and preview items on the eBay auction site to another that maps addresses on Windows Live Maps.

"Activities are how developers can integrate the content of their sites with the Web," said Hachamovitch.

Other enhancements and additions to IE8 include a revamped Favorites bar, automatic crash recovery and an improved anti-phishing filter. By comparison, Mozilla Corp.'s Firefox and Apple's Safari both currently offer crash of one sort or another, while Firefox also sports anti-phishing protection.

Earlier this week, Microsoft's IE development team announced that IE8 would support a new "super standards" mode by default , rather than optionally, to stress Web standards over backward compatibility.

"The Web gets better when developers spend less time on interoperability [problems] and more time on innovating," said Hachamovitch. "Long term, this is the right thing to do for the Web."

Available for Tryout

Although Hachamovitch pegged Beta 1 as fit for developers -- "Please try it out," he urged the MIX08 audience at the end of his presentation -- anyone can grab it. The client-side 32-bit downloads weigh in at 14.4MB for the Windows XP version, and 11MB for the Windows Vista edition.

"We're only part way done with IE8," said Hachamovitch. "But you can see where we're focused."