Item's "tax" and "description" fields are optional [1]

[1] https://developer.paypal.com/docs/classic/api/merchant/SetExpressCheckout_API_Operation_NVP/
coding standards http://book.cakephp.org/2.0/en/contributing/cakephp-coding-conventions.html
testBuildExpressCheckoutNvpBasics
ExpressCheckout supports Qty, tax and description now optional
Test case for custom shipping total
Allow a custom/combined shipping amount
Include qty and shipping info in README
Should probably start maintaining version numbers...Version 1.0.2