SWREG.org has been a tremendous "secret" adult processor for years, keeping a low profile and not advertising it. Even though their web site said they didn't process adult, the owner routinely gave you permission if you emailed him.
For years they have processed my dvd store and backup subscription processor, never missing a beat and able to process many countries ccbill won't touch.
Sadly they were just bought by Digital River and I got this when I logged in:
Adult category sales now to be restricted..
Please note that Adult materials have always been prohibited under our trading terms at
http://swreg.org/pages/author_agreement.html but perhaps not rigidly enforced.
As such materials cause us problems with our trading partner Paypal, as well as other major vendors on our system who prefer not to be associated with such materials, we must insist now that all such materials are withdrawn within the next 7 days after which such stores will be closed.
<sigh>