according to this xbiz article, PayPal is now OK with adult b2b transactions:

In the wake of the suspension of ePassporte’s ability to use the Visa network, an old friend of adult has returned to the fold. PayPal, which used to be very adult-friendly before being acquired by eBay in 2002, appears to be once again allowing the use of its network by adult entertainment companies as a B2B payment option. C2B payments, however, have as yet not been revived by the global peer-to-peer payment platform.
I can't see that the article writers confirmed this directly with PayPal, but if its true, then thats great news!