3-Rensho thread got me thinking.

Seriously. I've heard Ear-Roh, Eye-Are-Oh, Eye-Roh, of course I.R.O, and much more.
For clarification, so there can be a standard, whats the right way?
Especially hearing all about the group buy in real-non-internet conversations...IRO ten different ways gets frustrating. And when people talk about my Jamie Roy, oh man.