Just downloaded Skype to my iPhone, but not clear on how best to use it.

Does it only work where there is a WiFi connection? For example, in the hotels there will be WiFI at a cost - I asume we'll have to give a CC # to use that WiFi.

On the ship there is WiFi. I believe I get umlimitied access there. WIll Skype work with that? Since SKype charges a different fee depending on the country, anyone know what Country they will consider the ship?

And most important, what's the quality of a SKype connection from overseas? And how's the cost compared to an International plan on the iPhone?

Thanks