I saw the title and for a second I thought either someone managed to build a Kinect app for Windows 2.0, or Microsoft had gone even crazier with their numbering and had renamed Windows 10 to Windows 2.
You can also pin a site to the Start screen from desktop IE ("gear button" -> "Add site to Start screen"), and then when you click on the tile it will open in the desktop browser in "application mode", where it will act just like it would if you'd pinned it to the taskbar, with a separate icon that lasts as long as the window stays open.
So instead of cluttering your taskbar you can get the same app-like behavior by cluttering your Start screen instead (which has a lot more space, at the cost of requiring more of a context switch to access). Apparently this is so obscure that Gov doesn't know about it I think you can do this with the Start menu on Windows 7 as well.
I'd say that putting the "save" button in the on-demand app bar is not appropriate here - Save is functionality that is required as part of the core function of the page (as is clear from the fact that when the page is not saved it tells you that it's not saved) so it should be visible on the page canvas.
Don't place commands that are core to what makes an app great on the app bar. For example, in a camera app, place the "Take a picture" command on the app page rather than in an app bar. You could either add a button to the app page or simply let people tap the preview to take the picture.
@Charles: Awesome, looking forward to watching all those ... but what about "Going Deep: Inside WinRT XAML"? Or here's an idea, you could do an Expert to Expert with Erik Meijer and someone from the XAML team, and talk about the relation between Reactive Programming and data binding engines such as XAML's ... or you could even try to get Paul Betts on to talk about ReactiveUI ...
The "shortcut" I think is most important to know for the charms is that you don't really have to "hover" in the corner and wait for them to appear before moving up/down to the one you want. It works much better if instead you "swoop around the corner" in one continuous motion. This is not only faster, but also feels nicer and is more reliable because the momentum from moving to the corner will continue and prevent you from falling out of the edge.