Year-over-Year% Change in Online Advertising Spend by Industry (U.S., August 2009)   Estimated $ on Top Social Network Sites YOY% Growth Industry Aug-08 Aug-09 On Social  Networks  On All  Sites Entertainment $1,097,700 $10,012,800 812% 40% Travel $473,700 $2,198,200 364% -11% Business to Business $683,400 $1,941,700 184% -8% Automotive $1,110,200 $3,085,800 178%  -26% Health $1,131,500 $2,754,900 143% 8% Web Media $11,231,800 $26,855,700 139% 30% Software $526,400 $1,202,500 128% -29% Financial Services  $3,233,900 $6,415,900 98% -10% Public Services $6,836,500 $13,203,100 93% 13% Telecommunications $12,449,500  $23,550,300 89% -1% Consumer Goods $1,913,400 $3,349,200 75% 8% Hardware & Electronics $654,000 $1,022,900 56% -47% Retail Goods & Services $8,101,400 $12,556,800 55% -12% Source: Nielsen AdRelevance Read more at www.mediapost.com