Ive come out to two people, as it were, the first was a female friend of mine who was at the time the closest i had to a close friend. I told her on MSN (Actually, invented a stupid ask each other question game deliberately to get her to ask me...)
In hindsight, it was a mistake. Because we never addressed it face to face, it feels like an elephant in the room and as such we've drifted apart.

The other person I told was a (very) open bi/gay dutch guy ive only known online, told him on internet too... That was fine, mind you. But thats a different relationship.