Ten websites will generate an estimated $63 million in sex-ad revenue in the U.S. in 2010, and with Craigslist out of the “adult services” business many sites are jockeying for position to capture the revenue that Craigslist bypassed, new research from the AIM Group shows.

And even though Craigslist no longer runs commercial-sex ads in the U.S., it still reaped $30 million of that $63 million figure, in our revenue estimates.

“Sex ads: Where the money is,” is a 24-page report that researches commercial-sex ads on 12 websites in the United States. The research was conducted at the request of a private non-profit foundation that fights trafficking in children and women as one of its key initiatives.

The AIM Group projected that nine of the sites will generate almost $33 million this year in ads for “body rubs,” “escort services” and similar thinly disguised prostitution services.

A free summary copy of the report is available here.

 The full report is available for $395. All proceeds will go back to the anonymous foundation that sponsored the research.