Try contacting your local American Marketing Association(or Advertising Federation) group. They are always looking for speakers and sponsors. You could speak ab

Try contacting your local American Marketing Association(or Advertising Federation) group. They are always looking for speakers and sponsors. You could speak about the issue at hand if you are able to do it without making it into a sales pitch. They also typically are looking for companies to sponsor a luncheon for a fairly small fee. Then, you get a chance to speak with some of them after the meeting. You could also provide a few free subscriptions to the the service to marketing journalists and just ask them to take a look at the product for you. Don't ask them to write an article about it. If they see the use they may mention it in their publication. Do you have a referral program for current customers? Something like earning a discount if they get others to sign up. This can put a viral component in your product that can help it grow.