[larrysalibra]

It really depends on your target customer. If you're selling one off to businesses with POs/invoices like directory wizards apparently is, your customers don't want long payment terms, and your invoices values are high (> $x000) then credit cards probably don't make sense.

It's silly to pretend checks, wire transfers, and dwolla don't have costs. You're asking the customer to pay a month or two earlier than they would credit cards - many businesses will then ask for net 30 terms (or 60 or 90!). If you're providing terms, you have to run an accounts receivable department and make sure customers pay on time. You're also now in the position of tying up your own working capital providing vendor financing. With credit cards, these things are included in the price.