FHIR resources (and bundles) have always had metadata (ID, version, tags etc), but in DSTU-1 they were external to the resource, while in the DSTU-2 candidate they are within the resource (a not uncontroversial move). This post from Furore (one of the earliest supporters of FHIR) talks about some of changes that are coming…
Oh – any by the way, just looking at the picture that’s on the front page (at the moment) of the furore site, I’m so jealous that I wasn’t at the 2014 Amsterdam DevDays – I don’t suppose you could photoshop me in there?