Blizzard wants to change the Valor point system with the upcoming expansion Mists of Pandaria.
At the moment there is no maximum cap for valor points, there is just a weekly maximum. With MoP you are able to earn 1000 points per week and 3000 points in total. But there is another change too. If a char reaches the 1000 point cap you will get a buff named "Valor of the ancients". With this buff any other char on the same realm will get additional 50% valor points.