This list is not new, but I wanted one place to refer people to, these resources are a great place to start
Indyfromoz keeps an amazing up to date list of Windows Phone 7 Developer Resources at http://indyfromoz.wordpress.com/windows-phone-7-resources/ thanks Mate!!
If you live and develop in Australia, then I have a limited pool of Windows Phone 7 Engineering prototype devices for loan.
Once you get your application to test phase then click this link and email me and I’ll add you to the nomination list for a loan device, 1 to 2 weeks max…
Ideally email me a video cast of your apps progress, I will not share or otherwise disclose your Intellectual Property.