We looked into that a couple years ago, but decided against it at the time. I think there was some issue with setting up a "merchant" accounts in Time Master (e.g. we would have to become a vendor for it). There is no development kit for the Gopayment, so we cannot integrate with that. The only one we see that has any way of integrating with is PayAnywhere.com, so you would have to sign up with them specifically if we were to add this. Currently we are working on a project that needs to be finished first, so won't have time to look at it in-depth until after that is finished.