Prior imagining interaction scenaios with ultra-hype mobile devices that rocks, I should adress those questions :

How do students work together ?
How to they collaborate ?
Is SPACE (and space information) meaningul ?
Is background awareness useful ?
Do they maintain background awareness and how ?
What type of awareness do they need to collaborate ?
Do they need focused awareness information or something rather global (background) ?

Perhaps a short ethnographic study could help…