The consequences of the Varian disaster have been terribly exaggerated in the past 150-200 years to serve German nationalism.
http://www.google.com/search?q=teutoburg%20monument
lotta good thats done them
When you consider the loses the Romans just shrugged off during the 1st and 2nd Punic Wars, losing 2 or 3 legions does kind of pale in comparison.
In the book The Fifteen Decisive Battles of the World by Creasy mentions how the Germanic victory over Varius saved the Germanic civilization and eventually led to the modern (1800s) German Republic.
On a History Channel show not long back, the Germanic Victory over Varius showed how it led to the Nazis and the world would have been better off with Germany being Romanized.