Open-source agile PM tool that supports import/export from/to MS Project?

Hi folks, I'm trying to find an open-source agile project management tool that supports some form of import and export from/to MS Project. I don't expect this sort of integration to be elegant but we're a small team moving to a more agile/iterative methodology from traditional waterfall. Further, our PMO is MS-Project centered, so it would be nice if we could find a tool that supported some sort of import/export functionality to Project. Anyone know of a tool supporting this capability?

Thanks!