I don't know why people hate PayPal; perhaps they were evil in the past. (Actually, reading that website makes me wish Visa et al. got properly into this game.) Anyway, as Vietnam doesn't seem to use phone cards, I wanted to put some cash into Skype so I could call my parents. The payment options are specific to the country where they guess your IP is, and in Vietnam one cannot use PayPal to pay Skype, though PayPal is happy for you to manipulate it from within Vietnam. The only option usable to me — Moneybookers — asks for a mobile phone number in Australia, which may or may not actually need to be valid.
What to do? Well, fortunately the Skype website is accessible, and the server hosting peteg.org is in Australia, so I just used links to punt some cash over. This setup is so stupid — how many ex-pats want to do the same thing? — though I can understand that Skype figures it's better to be safe than useful.
(Thanks André, thanks Adelaide.)