Hello,
JFYI: as discussed during one of the previous calls, I just contacted a payment service (ePayment) for a quote.
Several people asked for a possibility to pay without PayPal, and the corporation I've contacted does offer that, i.e. direct payment via credit card and bank account.
I know it is used by the FSFE folks as well, and they seem to be quite happy.
I'll let you know when I have an offer. I'll also ping the Wikipedia folks for insight how they do it.
Florian