Here is a shot of drawers that I forgot earlier. The first one, which opens vertically, is one I use for my self-designed LAMP tools (notice, I even used the XAMP icon - the wrench and screwdriver icon 6 to the left is also a drawer). Just for reference, at the bottom of that drawer, I added another drawer. The second one is open horizontally. The closest I've seen in windows so far is to pin a folder, which linux can do, but thats a bit of a kludge.
I'm not trying to knock it, but when I saw that image, the very first thing I thought was that it reminded me of the old win2000 start menu.
That said, I do think jumplists could be more versatile. I'm hopeful that there will be a lot of developer support for the idea though. Right now, 7 isn't even "officially" out, but a couple of the apps I use already make use of the new taskbar/jumplist features. Once 7 has been out for a bit, I think we'll see a lot more practical uses for jumplists than simply pinning files, folders, and shortcuts.
My biggest grip with Windows has always been the lack of native customization options. You can do almost anything you want to Windows via the 3rd party route, but it would be nice not to have to go that route as often. I found a really fantastic app that provides edge snapping, a bevy of window placement shortcut keys, and a few other nice options, and while I would definitely call it a keeper if it were free, the author charges $25 for it. There are some free apps out there that provide some of the same functionality but are ultimately inferior. Or I can write an app myself (blah).
PS - tip - if you hold shift when you right-click on taskbar icons, you'll get an alternate set of options. In most other cases, you'll generally get the same list with a few extra options.