birdoasis:
Frustrating to say the least is the fact that google checkout prides itself on bypassing Zen Cart's create an account feature. This means that the customer isn't placed into our database unless they actually buy something. My problem with that is that we don't have a way to contact them later unless they sign up for the newsletter.
Hi John-
That is not the case. If customer checking out of your shop with Google Checkout decides to "hide" their email address from you (via checkbox on the Google Checkout order page) Google Checkout auto generates a @checkout.l.google.com email address for your customer, and the email address is automatically used to generate a new account in your Zen Cart shop.
After a completed Zen Cart order look in the comments on a order page in ZC admin and you will observe both the email address along with a generated shop login password.
birdoasis:
Another problem with the Google Checkout option is that it completely bypasses the checkout page. So if you are using other payment systems the customer doesn't see it unless they missed the big honking google checkout button.
Similar with PayPal Express Checkout (PPEC) or other express checkout mechanisms. It's the nature of the beast.
I'm a firm believer in not putting all your eggs in one basket.
PayPal Express Checkout (PPEC) is very similar to Google Checkout (GC) in many respects and has similar limitations. One plus of PPEC is the maintainer of the PPEC mod for ZC is also on the ZC team thus has inside knowledge of the ZC architecture. So that mod matured quickly.
However the most recent GC mod v.1.4 has also greatly matured and for the shops I support PayPal and GC are running neck and neck as the preferred choice of payment. Naturally with GC not charging processing fees until 2008, I prefer customers select GC. That is a no brainer.
Useful GC mod info and more is available at the new Google Checkout support forum (applies to current v.1.4 mod).
http://groups.google.com/group/google-checkout-for-zen-cart-mod-support
Woody