PVP players take note, GW2 is adding a Swiss Tournament system.
What is the Swiss Tournament system? To quote the news release:
Swiss is a system in which the number of rounds is based on the number of teams participating. You will not be removed from the tournament after losing in a Swiss round. In each round, each team plays a team with the same record, if possible. All teams will play all the Swiss rounds, unless they get a bye.
For more information on Swiss Tournaments, including information about the current beta testing phase, see the official news article.