These figures from MediaPost show the percentage increase in online content sales from the first half of 2004 to the first half of 2005:
Entertainment and lifestyle sites 45%
Research sites 39%
Games sites 23%
Personal growth sites 19%
Personals and online dating sites 8%
General news sites like CNN.com and NYTimes.com had a 14% decrease in content sales. (NYTimes.com has since starting offering Times Select, requiring payment for columns and other premium content which might turn their spending numbers around.)
89% of web surfers had not paid for any content as of June 2005.