Today's key (June 9th) has been won.

[»LLF«]The Invisible Rogue has won today's key. He was the first to email us the correct code from today "nightshift". It was hidden on the "Key" tab (fitting, no?) in a cell on the right and read 'You stayed up later than usual. Today's special word is "nightshift"'. Congratulations to Invisible Rogue for winning. Good luck to everyone for tomorrow's key (details on all the key giveaway madness here).