Many vendors of IT equipment offer Visio stencils for their products. It would be great if we could use them in Gliffy.
At least for us the possibility of importing Visio stencils ("shapes") is much more important then importing whole Visio drawing.
If this is some time (hopefully not too far in the future) possible, it would make sence to import them globaly and not per page. A request like this for shapes is made several times here.