Just got done with my Skype interview. Surprisingly short, only 30 minutes including my time to ask questions, so only a handful of issues were addressed.
One unexpected zinger "Sell the undergraduate school you attended" ie. convince me to attend the school you attended for undergrad. Lucky for me, it happens to be UMich! I think they were looking at how convincing/passionate you are about the institutions you are associated with.
Really, really nice interviewer, 2nd year student. Fun to talk to, and I think representative of the Ross community. If anyone has questions about skype interviews, let me know, I've done about 4 of them.