Presumably this will be after the World Cup but anyway.....
Quotes from The Indie:
"You can play to a certain age. But it's nice to get some rest also. The experience I have now got with Manchester, and how many games you play, you don't get that many days off during the season. The most time players get off is during the international breaks. Maybe I can prolong my period with the club by quitting the national team."
"In 12 years you go through the team and go from here," says Van der Sar, pointing at the ground, "to here," pointing up. "And I don't want to say you gain more importance, but you are more experienced and you can show players things or talk about things. Things you didn't think about when you were 23."