There used to be one, but I don't know of one anymore.

Probably the best solution for us, at least as far as I'm aware, is one of 
the virtual credit card terminals...which is to say, a merchant account that 
provides online credit card processing. There are several of these. I have 
an Email somewhere about how one can get a fairly cheap merchant account 
from Costco. An option i've used in the past when i was working with 
Scent-Sations (a candle company) as a distributor, was at www.propay.com 
(I'll look it up if someone's really interested). While they do have a 
higher per-transaction fee, it's cheaper in the long term if you don't do a 
lot of business, like enough to get the good discounts from traditional 
merchant account providers. Anyway, it hada fairly usable interface which 
worked with Freedombox nicely and with IE; probably with Firefox, too, but 
that wasn't an option when I used them.

Now, of course, Watkins handles all my credit card transactions, or else 
Paypal does, so I don't need my own at this point, so i'm afraid I don't 
know what's currently available, or what's changed, if anything.