This sounds like an over-all 'legitiment' idea, however; I tend to see Skype as something you would use for chatting, perhaps with the occasional roleplays sprinkled here in there if you ever get bored. Nonetheless, with several younger-ish users (Like myself; I'm only eleven, and although I do have a skype, I know several other people that are thirteen years old and are not permitted to have a skype) going around, and parents wanting to keep their real face and what-not a secret from others. If everyone followed this idea, well; there might be a bit of an issue with who joins and who does not.
But, it is a cool idea! Skype is most certaintly a good program to use when roleplaying, but when it comes to groups and what-not; this program is best left to be used as mainly just something you 'chat' on, or perhaps just roleplay out a few things on; it's not exactly 'advisable' when you're sitting around with giant groups, xDD.