I actually had gotten the security tab via a shell extension a while ago, but it seemed to be the source of instability problems, so out it went. There are other ways to do it, but MS lets you have it for free with the Windows NT SP4 Security Configuration Manager. I haven't tried it out yet, but it sounds pretty sweet. Not that I really need it, but hey, it's power for nothing.

Here's the download page, here's the FTP folder it's in, and here is a direct link. If you check out the FTP folder, the file you want is SCESP4I.EXE.

[found via Grand Stream Dreams]

Update, December 19, 2009: Having just had to install this due to a couple of folders on my external hard drive getting locked by my previous XP install, I can now recommend a specific install procedure. Run SCESP4I.EXE, select a folder in which to extract the files. Go to the folder, right-click setup.inf, click Install, and wait for the magic to happen. It will inform you, if I remember correctly, that you will need to restart your computer for the changes to take effect. That, fortunately, is not true. You can test this by right-clicking a file, going to Properties, and going to the Security tab. There it will be in all of its XP Pro glory. Enjoy.

Maybe.

It's actually become fairly like the OS X dock. The idea is, "why show a button for an app that already has one in Quick Launch?" So Quick Launch is getting consolidated. This is actually a pretty big move, considering how long the taskbar has been relatively the same. And I'm told there will not be an option to go back to the old style. It's a pretty cool idea, but of course it has risks and naysayers. One person pointed out that taking the text off of the title bar could remove a source of information via changing window titles (e.g. a game score or inbox count). Good point. Also, it was asked in the comments, "how do you know what's running and what's not?" Also a very good point. I think if the W7 team can pull off making it concise, clear, and useful, it's worth it (and customers might even like it).

Also interesting: Aero Peek. Move the mouse over a window thumbnail from the taskbar and that window appears and others fade away. Sounds like a cool feature to me. Not actually switching, but you can get a bigger look if you want to.

This post over at the Engineering Windows 7 blog (yup, from the MS team) illustrates and talks about the new taskbar in depth. Definitely worth reading if your interested in that sort of thing.