Now I know josh showed me this on steam, but so our ideas can be more easily reviewed instead of steam where the disscussions will drop the moment you close chat or logoff, I decided it needed to be here
Now the video you gave me really did a good job gathering the known clues right now all into one small video. The recent space looking tanks really does add a spin to the already weird hints going around.
I love how valve integrates old stories (or plot holes) into the current system. Obviously valve had some of this planned a VERY long time ago, but still nice that some sense is finally coming to the plot!
ALSO: I don't think this was mentioned in the video, but you remember the old will? Well if you do, you will recall there was sand over some names and/or important info that valve either did not know what to make of them at the time, or knew exactly but wanted to create buildup. EITHERWAY, more info about "Grey" was added where the sand was covering up (mainly the last paragraph or so):
http://www.teamfortress.com/mannwill/
(note: you are free to throw your ideas even if they are Conspiracy or new facts)