You can accept online payments in BookingBug with USA ePay. If you don't yet have a USA ePay account, you can sign up for one.
To set up payments using USA ePay, follow these steps:
Click the Cog/Settings icon > Advanced Settings > Online Payments.
Click Change and select USA ePay.
In the USA ePay section now displayed:
Enter your USA ePay Source Key.*
Configure the other settings as you require.
Your customers will now be able to pay for their bookings during the checkout process.
*For information on how to generate your source key, please read this article from USA ePay - http://wiki.usaepay.com/merchant/console/sources