I just saw one on tv.  It had PC sitting at a table with a stack of money, and the Mac guy asked what he was doing, and he said that the huge stack was for marketing Vista, and the small stack was for actually fixing Vista.  The Mac guy then asked if he thought the small stack would be enough to fix it, and the PC guy said, you're right, and pushed all of the money into the marketing pile. 

That was a pretty harsh attack on the windows without walls campaign.