Over the last week I have delivered a session in Christchurch, Wellington and Auckland on Designing Metro Style Apps.
I have received a lot of positive feedback on the session and a lot of people have contacted me for a copy of the slides.
Unfortunately we are not in a position to release the slides from our camps just yet. These will be coming (along with the labs) in a few weeks time and I will publish a link here when they are available.
That said there is a lot of material all ready online on the topic that I presented.
I recommend that you start with the presentation and slides from Designing Metro style: principles and personality by Sam Moreau and Jensen Harris's session 8 traits of great metro style apps.
Then take a trip to the Dev Center to check out the UX guidelines for Metro style apps (including Photoshop templates)
There is also a good post summarizing these on blend insider as well.
Hope that helps