IE6 is now two versions behind the current release.

IE6 is almost 8 years old (it was released in 2001).

IE6 is lacking in many capabilities that all other modern web browsers have, in web technology, in security, and in features you can use.

You can read a review at Wired, a write-up from the IE team, or a summary of technical changes from WaSP.

Of course, Internet Explorer isn’t the only option out there. There’s Firefox, Opera, Chrome and a host of other alternative browsers that are worth checking out.

If you’re still running Windows 2000 or some other old version of Windows that can’t run IE7 or IE8, I’d absolutely recommend Firefox or Opera. Either will be much better than IE6, both will run on Windows 2000, and Opera will even run on Windows Me and Windows 98 (but you really ought to move to something more current than Windows Me.)

Good:

• Site compatibility seems to be fine so far, with a couple of minor issues (see the “Bad” section).  Mostly I’ve tested it with a couple of forum sites, LiveJournal, Slashdot, and WordPress.
• I like the simple settings box, with “Basics,” “Minor Tweaks,” and “Under the Hood.”
• It does feel fast.
• Showing the URL of links in the lower left-hand corner is a perfect compromise between the spatial advantages of a permanent status bar and the extra room provided by leaving it out.
• I like the task manager for the browser itself.  It’ll be good for developers, but it’ll also be good for users: as the comic points out, if your browser starts chewing up all available resources, you’ll be able to tell what page/plugin/program is at fault instead of just blaming the browser.

Bad:

• Gears support doesn’t seem to work quite right.  WordPress.com doesn’t detect that it’s available.  Local WP installs with Bad Behavior can’t sync completely.  (It doesn’t send an Accept header on the request for one of the TinyMCE files, which causes Bad Bahavior to think it’s a spambot and triggers a 403.)
• Cookie management is too simplistic.  I like to accept all cookies temporarily, but clear everything when I end my browsing session, with exceptions for sites where I want to stay logged in.  This is easy in Firefox, a little trickier in Opera, and doesn’t seem to be an option in Chrome.
• I have seen it pause a couple of times, with as few as 5 tabs. [edit: these seem to be related to Flash content]
• No Incomplete spell-check.
• I keep hitting the forward-slash key to search within a page, since that’s the shortcut I’m used to in Firefox and Opera.

It’s got built-in support for the Gears API (not surprising). And, like Firefox 3, IE8, and Opera 9.5, it’ll do full-history search & auto-suggest in the location bar. Interestingly, they’ve adopted a couple of UI elements from Opera, including thumbnails of your most-visited pages when opening a new tab (like Opera’s Speed Dial, though in this case the list is automatically generated from your browsing behavior), and putting the tabs above the main toolbar — something that Opera has taken a lot of flack for.

According to the blog post, the first preview release should be out for Windows tomorrow, with Linux and Mac following.

Oddly enough, I found out about it through comics blogs (A Distant Soil, specifically), not tech blogs, because Google hired Scott McCloud (Understanding Comics) to explain what makes the browser different in comic-book form.