Hi Fred,
To be honest, we hadn't heard of Microsoft RoundTable.
We've been so deep into the development of BigBlueButton for the past few years -- and so immersed into the open source community -- that the question of how we might connect with Microsoft's unified communications hasn't come up until your post.
That said, we do have an API that others could use to integrate into other products. The API is http based, so it could be called from pretty much any web-based application. For more information, see
Does BBB support Microsoft RoundTable's panorama/speaker views? Also,
how deeply does BBB integrate with RoundTable, if at all? Thanks!