I've had a lot of people ICQ'ing me asking who I would recommend that does a partnership program.
I only use one currently....
http://www.adultpaymaster.com (also offers pay per signup)
I send to APM because I know and Trust Timbo. He is not a fly by nighter... and is well respected.
As for the other programs I send to and have good results.
http://www.adultrevenueservice.com
http://www.pibcash.com
http://www.cashquest.net
http://www.topbucks.com
http://www.quickbuck.com
http://www.silvercash.com
http://www.nastydollars.com
http://www.siccash.com