There's a really detailed breakdown here: http://www.untitledstartup.com/2010/02/accepting-payments-on-the-real-time-web/ http://www.untitledstartup.com/2010/0

There's a really detailed breakdown here: http://www.untitledstartup.com/2010/02/accepting-payments-on-the-real-time-web/ http://www.untitledstartup.com/2010/02/accepting-payments-on...