Out of curiosity, why isn't google checkout an integrated option with ecart?
I always just assumed that it was not possible to integrate but I was just on the checkout site and saw a whole list of shopping carts that support it.
I have a client that is, well, difficult. Try as I might to steer her to use a supported payment gateway she of course signed up with google checkout (she thinks PayPal seems "lowbrow"). I have already spent WAY too much time with this woman and now it looks like I have even more work ahead with adding the google gateway. ugh.
For the future it would be nice to have a valid argument against google that I could tell people ("i don't know how to add it" doesn't seem appropriate...)