bw100 - 10:33 pm on May 19, 2011 (gmt 0)
because I am not known by the people at the advertisers and agencies that I will be contacting. I have to make an approach
Advertiser and agency personnel are accustomed to contacts with new media and media personnel.
One way to look at this is that it is in the best interest of the company / client / product to take your call and listen to your pitch. BUT: you've got to have a good elevator pitch to get their attention, and either get the F2F appointment, webcast appointment, or commitment to view your presentation.
I suggest a web-based presentation, customized (to client, or at least market segment), with a log-in / registration required to view. It will confirm that they made the commitment to view, and allow you to determine an appropriate follow-up schedule.