Opinions on the checkout process, anyone?

[eluser]Jondolar[/eluser]
IPN will pass the shipping data back to you:
https://cms.paypal.com/us/cgi-bin/?cmd=_...TVariables
Yes, you can have a "checkout" button that posts to a page on your website and verifies the "t & c". Then, display a form to the user with all of the info to pass to PayPal and use javascript to submit automatically (with a submit button to click if not redirected).

You might also want to consider just using PayPal's cart if you haven't already.

Good luck with your project.