I'm trying to do a study on what most payment gateways hosters use and what payment gateways most customers use. For us, we currently only support Paypal, but we want to start supporting others too.
We do accept google checkout, paypal, webmoney, moneybookers, alertpay, local bank transfers from next month we will be flexible to Chinese customers and will accept Alipay.
webmoney, moneybookers, alertpay are great alternatives that many webmasters are looking out. Having said that, most of the people opt for CC or Paypal only.