This week at Build 2015 and Raspberry Pi and various other hardware vendors were present. One of the key announcement was the availability of Windows 10 IoT Core Insider Preview
The Windows 10 IoT Core Insider is a public release of Windows 10 for Raspberry Pi 2
So how do you get access to Windows 10 IoT Core Insider Preview
To get started register at http://ms-iot.github.io/content/GetStarted.htm
You need to create a connect account
You need to have a windows 10 insider account http://insider.windows.com
You have to take the survey on Connect and accept the terms before getting access to the downloads.
The Hardware support with IoT insider are
The RPI2 and Minnow run the Windows 10 IoT Core.
Windows Remote Arduino allows the control of an Arduino board through a Bluetooth or USB connection from a Universal app running on, say, a Windows 10 Phone or Desktop.
Windows Virtual Shields for Arduino abstracts (or virtualizes) Arduino libraries up into a Universal App on a Windows 10 device. This includes the Arduino wire library.
The Galileo runs a headless IoT version of Windows 8.1 with an Arduino IO profile
Some key IoT Sessions and announcements
Sessions with the IoT content: https://channel9.msdn.com/Events/Build/2015?t=internet-of-things
Raspberry Pi, Arduino IoT Session Windows for Makers- Raspberry Pi 2, Arduino and More
Getting a understanding of IoT - Internet of Things Overview