As a band owner myself, I have been wanting to get involved with developing against this device to read sensor data now that I have started down the Universal Windows App road, and this talk give you a good introduction so that you can get started right away.
I highly recommend watching it.
You can get started on your Microsoft Band Development journey by going to the official developer site.
In this article I thought I would post links to some free training resources for Windows Phone 8 Development. I have started playing around with Windows Phone 8 Development so I thought these resources would be useful for other people too.
I will keep adding to this page as I find other useful, free, resources. If you have any videos or articles that you feel would be useful here then please let me know in the comments and I will add them to the post. I would like it to be an archive of good material.