The last key!

We are down to the last key launching the self destruct system! Good work people!

I got a message in twitter from a friend that the hint to the last key is: "This is the most important activation key. There are no hints available. You just have to know it"

Looks like Richard is already heading back, so we are running out of time. Anyone have any ideas what could be the most important thing that Richard is talking about?

Message #15, part 2

I knew there was something missing from the page I linked here yesterday! Richard was just hiding it in his "well hidden" USB memory stick. This is what I found:

Message #15

I happened to notice that Richard set recently this page as his browser homepage: http://stoptoilworndiamond.co.nf/cafe.html. At first I thought that he just likes to watch the picture on the page (not a big surprise there), but then I noticed the url and realized that it's one of those messages again. Anyone find anything interesting there?

Message #11

Look what I just received! This time I didn't even have to steal it, because a co-worker sent it to me. People have been passing it around since they find it funny that the big shots of the company have ended up in the puzzle! Obviously, sharing this information with co-workers violates almost every part of the company loyalty policy, but apparently some people are willing to take the risk.

Richard has been partly impressed to see his own face in it, but also somehow scared of what it might reveal. I heard a rumor that he filled every empty space with his own picture and then said to one of my co-workers: "Use the uplook to check whether it leads somewhere, chop-chop!", but apparently it didn't.