[Brian]

Visio support is one of the things we're looking into, but the task is far from trivial and we can't predict when/if we'll be able to get it in there. We know how important this is to the folks that need it - if it ever looks like it's impossible to pull off, we'll make sure folks know; it doesn't do us any good to keep you waiting for a feature we can't deliver.

Barring some announcement like that, though, you can assume that we're looking at ways to get it in there but don't have anything specific we can say yet. Hope this helps!