After the fun PDC Session where the Indigo Panel sings "Give Soap a Chance", Don is giving a talk which is his "last chance" to talk to us all. Since he has no powerpoint anymore ( it was deleted last session in a fit of power-point overload rage) he is taking notes in code. I like it, this is very succinct:

/*
Indigo Connector = {Port, Channel, Message, Service};
*/

Giving the concept that the Indigo connector model consists of only four concepts. Can you guess what they are?