An MSU that will allow you to upgrade a copy of Windows 8.1 to the leaked version of the update 1 that will arrive this spring has been leaked and is now available for download.
Giveaway: Win the Logitech G910 Orion Spark mechanical keyboard!
Six Windows 10 features not available to Insiders... yet
All the latest on Windows 10 build 10041
windows 10 technical preview
Microsoft wants to turn Android phones into Windows 10 phones
LG Windows Phone mock-up
How to get Cortana working outside of the US in preview build 10041