Valve’s new VR headset, the Steam Frame, is dropping very soon, and today is the first day you can sign up to purchase one of your own. Much like with the launch of the Steam Machine, the console-like PC that dropped earlier this year, today is the first day you can get added to a randomized list to be selected to purchase a headset of your own. Sign-ups are available now and will be live for 72 hours, ending at…