Hi David, all,
I agree that the more we can make DMPs 'active' so they're updated and monitored the better. There are a couple of examples from funders where they expect DMPs to evolve. See for example NERC, which has an outline DMP at the grant proposal stage and a full plan post-award that is created by the data centres together with the PI. The Horizon 2020 open data pilot meanwhile asks for DMPs as a project deliverable that should evolve to gain more precision and substance during the lifespan of the project.