Untill Register.com stops stealing it's customers expired domains I'll avoide them totaly. 2 of my customers have lost of their domains to register.com - I don't need a 3rd to remind me why I left register.com. The only worst reseller program is NetSol's - you might want to avoide that one to.
Dotster will do that -- see ir.dotster.com for details. You sign up as a reseller, you can templatize your pages with custom headers and footers, they handle the billing and cut you a check when your account reaches $50 or more (I think).