wpegg: Q. I've got a fragment to the game I want, why on earth would I let anyone else know about it? A. There is more than one copy of every fragment in play. I know which ones are being traded, because I know which ones are being validated. Someone else also has a copy of that fragment. It may be worth trading it and racing, than sitting on it and finding out everyone got it from the other person and doesn't need to trade for yours. If no-one is trading a particular fragment, I will just bleed it into the game by PM'ing it to a random person. This is to keep the game fluid, as otherwise it just becomes a stalemate. So trade!
This wasn't well regulated in the previous game, I remember one participant holding on the part of Zeus code forever. Then you probably just PMed it to someone else.
Anyway, I'm pleased that you stated the rules&tips and hope that people will follow then and not let nastiness overcome them more than it should. ;)