Sharing the reward is a problem whether an MMORPG or in a coporate division
It's interesting to see the evolution of reward mechanisms in MMORPGs. In multiplayer situations, it is often difficult to tell who completes a task when there are a number of steps involved. For example, in a raid on WoW against a single monster, who gets recognition for the kill when it takes 40-80 people working as a team to kill that beast? It's defined now in WoW but this same problem existed all the way back to the days of text MUDs.
In the first generation, essentially there was no thought involved in this. Whoever made the killing blow got the points for the kill. Very primitive and the cause of many an argument. The next few improvements--it came in several different ways--was to add a list on the create being attacked where it kept track of who the attackers were and distribute the points based on how many points of damage each person made on the creature, so the distribution of experience points for the kill was more even. WoW provides a newer version of this whereby each person engaged in the raid gets dollars per kill, which once the creature was dead, they could spend to buy the reward items.
However, this still raises a problem when there are items that several people want to share from the common pool of rewards. In the people-administrative way, the guild--there's usually a guild involved--makes a decision on who gets what. This is where it breaks down again: what happens when there is an item so unique that the top contendors or leaders will argue for it. As my friend Eric described, that is the death knell of many a guild.
If you think this is a situation limited to MMORPGs and games, you're mistaken. This same situation exists when you have a community that is working for a shared goal, and there is some reward that needs to be distributed across the membership. In team scenarios in corporate environment, that is not very different than negotiations for annual bonuses. The differentiating factor is that in MMORPGs as in other communities, the group of people are not part of a single formal organization with defined managers and advocates. Instead it is up to each person to argue their own case. In other words, it is even more difficult in communities.
I don't have any answer here, but it is important to recognize that the situations are similar here, and compare what methods of distribution or approaches people take.