Oh man, that sux.
My experience with 2C is from my old hosting company (a different set of clowns) who used this payment service. I wasn't impressed with the system, never could reconcile payment emails with the services, although that's a different issue.
I was wondering what percentage of customers choose 2Checkout over PayPal at your directories, John?
If I recall correctly you started with just PayPal? Did you get any noticable bump from providing the alternate option?
I've got a merchant account, but might be a pain for me to integrate with my dir, so I'm wondering about the potential upsides.