Is there any "non-adult" application of your technology/process/methods? If so, one strategy may be to show that this will work with many different types of content and not just adult content. That way you go from being a purely adult oriented company to a technology company with multiple markets, one of which happens to be the adult industry.

For example, the ad network Adbrite operates one general purpose ad network under their main brand and another adult version at blacklabelads.com. They have traditional investors, including Sequoia.