I found the VW "umpimp my ride" commercials to be extremely effective. The use of both German and American stereotypes proved to be very amusing as well as attention getting. The joyride was a bit less funny as the overplayed sexual innuendo took away from the overall feel.

http://www.consumerist.com/consumer/ads/new-vw-ads-in-da-haus-156737.php ; http://www.vwfeatures.com/

CPB views teamwork as very necessary. They say that who you help today may be the person to save you tomorrow. They also say supporting other peoples ideas are critical to their success. They say advertising is whatever makes their client famous regardless of medium. I would not want to work there because despite the supportive atmosphere, advertising is a stressful and cutthroat job.
http://www.cpbgroup.com/

TBWA has a more modern hip feel. Whereas CPB had a more traditional feel despite its more realistic approach. It seems that TBWA would be a good agency for people to enter their advertising career.
http://www.tbwa.com/

Grey has a very strong and professional preference. As said before, CPB maintains a composed and conservative presence online. Grey uses a well executed and attention grabbing flash movie to get their mission across. CPB was more realistic with their aims while Grey's said that anything was possible
http://www.grey.com/