Jaffa Cakes. While I'm a huge Wonka fan and I love the idea of flavored wallpaper, I think that being in a small enclosed space, surrounded by my coworkers' spit, might just give me the willies. Lovely concept, though!
Update: Five minutes after I posted this, I came across this bit of important info on the Jaffa Cakes' Facebook page. On the hygiene point - once a Jaffa Cake is licked they're removed by the bell boy (out of shot) so no-one else can lick them. We don't want a Jaffa Cake induced epidemic on our hands!