Hello, Aaron!
>
Second, I'm planning on using osCommerce for my store. I understand I need a merchant account to accept credit card transactions. Are there only certain banks that I can use with osCommerce? Is there a useful FAQ on setting up a merchant account, preferably related to osCommerce?
>
You can just open merchant accounts and they will collect the money. When some money is collected you will transfer money from merchant accout to your bank. Some merchant accounts are 2checkout.com (receive worldwide payments), for UK payments you can use ePDQ service http://www.barclaycardmerchantservices.co.uk/epdq/index.html. So, once you have merchant account you can transfer money to different banks.
Thanks,
John