Made up word?

Earlier today, I prepared the Powerpoint presentation I'll use at the Cross Media conference CMID this weekend (it's jolly good to attend a conference in the snowy mountains of Hemavan, as you can toss away a few of the compulsory black cocktail dresses from the luggage and instead add a soft and cuddly slalom outfit) and I'm wondering whether there's such an English word as cross mediality. Even now, Blogger suggests swapping the word to cordiality or materiality and the post-modern quality check Google generates only 523 hits. Umm, I believe I need to rephrase that.