I want to start a discussion about online payment processing. I think it is fair to say the majority of us will have a PayPal account, but MoneyBookers is a smaller yet equaly good payment processor, and of course there are others, even new sites that have yet to start such as Paybox.me.

Recently I'm noticing MoneyBookers advertising a MasterCard Debit card and they seem to be quite aggressive in promoting the card.

Does anyone actually use a payment processor other than PayPal, and what do you prefer, and why?

What do you think is the future of online payment processing, can you see a day when webmasters and contractors will need multiple providers, or will PayPal always have the upper hand?