Brian...
very true...have even tried I&M bank...and for you to integrate you need $2500 and a monthly fee of $200 and also commission on sales... these fee are prohibitive but compared to gateways like Paypal which are free to open accounts and no monthly fee and their transactions being low are very great.
Willie
we have another one based on mobile payment called ipay which uses MPESA and ZAP but this is not much open to international E-commerce