Obviously you're not playing as Shephard in ME3's multi-player but as one of many other soldiers in the war. Does this mean that multiplayer levelling and progress isn't linked to any specific Shephard's carreer but will count for any Shephard on that machine?
Further, as we have to link our copies of ME3 to a Bioware/EA ID for DRM purposes, and as there will apparently be BSN (Bioware Social Network) integration (see below), does the mean that the multiplayer levelling/progress/items will count cross-platform?
From Bioware Blog: My Interview with Mass Effect 3 Producer, Jesse Houston
Will BSN track co-op statistics? ie: classes played, enemies killed, wins, losses etc?
We are investigating this right now. There will definitely be a lot of BSN integration. What the final list of things is, we don’t really know yet.