no one cares about security and I think swinog should care about security!
use IRC, install one of the thousands IRC clients available and ask your security guru to open the port, or do it on your own ^^
You can connect via SSL for a little bit of enhanced security (and the connection between the servers is also encrypted).
As alternative of Skype, we can take it to the max and use the chat-system of World of Warcraft. We just have to choose, if we play for Alliance or Horde and may use the guild chat (the famous n00b-pwning Swinog-Guild) </badhumour>
Boris.