abm released some data on tech media revenue 2011 (ITC) and share by category
"The size of the technology industry in b-to-b media"
2011 Revenue (in Million USD)
USD 179.27 Print Advertising
USD 719,74 Digital Advertising
USD 109.44 Classifieds and Directories
USD 64.56 Lead Generation
USD 9.04 eMail
USD 67.70 Mobile
USD 76.74 Digital Video Commercials
USD 288.92 Ad banners / display ads
USD 47.55 Sponsorships
USD 55.78 Rich media
USD 899.01 Total Tech Market (excl. exhibition)
via/more abm