I would like to explain my reasons for wanting this.
I have created a presentation in Prezi, but it is going to be given as a 5 minute talk alongside 3 other people who are presenting. The organisers would like to integrate everyone's slides into a single PPT, so that the switching time between presentations could be reduced.
With an easier way to link to my prezi, I could embed a link in a PPT slide, give that to the organisers to put into the flow, and then follow that link to start my presentation (offline).
It would help me adopt this, and to convince others that it is usable and portable.