Mike and I play with each other on occasion, while we talk on IRC.

However, we have rules not to tell each other what we have until the hand is over or the other guy is out of the hand. On the other hand, its quite obvious that we know how each other play, and will not back down to one another.

Imagine I am in the small blind and completed, then proceed to bet out on the flop....I would say this is a dead giveaway I'm on some sort of power-draw. You usually don't have to talk to each other to have a clue what he has, just by the way he is playing his hand.

We condone all such cheating however. And if 2 or more players colluded, the profits between them would be so miniscule they are better off playing on separate tables.