It seems that there are some defaults that GC assumes when you sign up for a USD account and when you sign up for a GBP account. I'm trying to sell in GBP and ship worldwide. If I set it to my USD (sandbox) account, I can have deliverable to US, but not if I sell from my GBP account. I think I've set the right areas in the shippable and tax areas. Here's my CART xml. It never gets to a callback but says not shippable if the customer is US based:

<?xml version="1.0"?>

<checkout-shopping-cart xmlns="http://checkout.google.com/schema/2"> <shopping-cart> <items> <item> <item-name>PC-SWAT3</item-name> <item-description>SWAT 3: Close Quarters Battle</item-description> <quantity>1</quantity> <unit-price currency="GBP">79.99</unit-price> <merchant-private-item-data> <graith_prod>pid=21 weight=7.00</graith_prod> </merchant-private-item-data> </item> </items> <cart-expiration> <good-until-date>2007-08-25T13:26:33</good-until-date> </cart-expiration> <merchant-private-data> <graith>osCsid=180ad649bceb054da8343c0257e4000f shipping_weight=7</graith> </merchant-private-data> </shopping-cart> <checkout-flow-support> <merchant-checkout-flow-support> <edit-cart-url>http://localhost/shopping_cart.php</edit-cart-url> <continue-shopping-url>http://localhost/index.php</continue-shopping- url> <shipping-methods> <merchant-calculated-shipping name="Per Item"> <price currency="GBP">2.5000</price> <shipping-restrictions> <allowed-areas> <world-area/> </allowed-areas> </shipping-restrictions>

</merchant-calculated-shipping> <merchant-calculated-shipping name="Flat Rate"> <price currency="GBP"> 3.0000</price> <shipping-restrictions> <allowed-areas> <world-area/> </allowed-areas> </shipping-restrictions> </merchant-calculated-shipping> </shipping-methods> <tax-tables merchant-calculated="false"> <default-tax-table> <tax-rules> <default-tax-rule> <shipping-taxed>true</shipping-taxed> <rate>0.175</rate> <tax-area> <postal-area> <country-code>GB</country-code> </postal-area> </tax-area> </default-tax-rule> <default-tax-rule> <shipping-taxed>false</shipping-taxed> <rate>0.0</rate> <tax-area> <world-area/> </tax-area> </default-tax-rule> </tax-rules> </default-tax-table> </tax-tables> <merchant-calculations> <merchant-calculations-url> http://localhost/google_checkout.php</merchant-calculations-url> <accept-merchant-coupons> false</accept-merchant-coupons> <accept-gift-certificates>false</accept-gift-certificates> </merchant-calculations> <request-buyer-phone-number> true</request-buyer-phone-number> </merchant-checkout-flow-support> </checkout-flow-support> </checkout-shopping-cart>

Can anyone see anything wrong?