Do you know of free text messaging for Greek?

Would anyone know of a free, downloadable software program my Greek group could use for real-time text messaging? It has to allow us to use our own fonts so that we can message to one another in Greek and English. We used to have Yahoo Messenger; but, Yahoo is getting tempermental on us, and allows some of us to communicate, while denying this service to others, all very indiscriminately. Thank You.

Chris

I have used Skype’s text chat, AIM and, briefly, MSN’s chat with unicode Greek. All work fine for me under Mac. I think there may be problems with input methods and Skype for Windows people.