I'm playing around with Windows 8 for the competition and I find the plugin a bit lacking.
Two thing really stands out, the first is Live Tiles:
Microsoft itself suggest that text only tiles should be used as a news ticker (weather, actual news, twitter, etc) and honestly they look really ugly for a game, especially since there is no support for real push updates (example when your score has been beaten while you were doing something else). We really need support for tiles: TileWideImageAndText01/TileWideImageAndText02 which is perfect for a game.
The seconds is the way Privacy/About/Support are handled, the plugin offers only a choice of Yes/No while it should support paths. For instance if I want to use an online policy I should be able to add a string in the plugin setting telling c2 where to look for it, either online or local in a custom subfolder.
Now I already done both of these stuff in a custom plugin, before releasing it I'm asking if they could be implemented in the "official" one to avoid fragmentation, what you think @Ashley?
I can give you the code as everything is made and tested..