Integrate paypal express checkout as well as Google checkout into existing custom .net / VB based ecommerce site

Integrate paypal express checkout as well as Google checkout into existing custom .net / VB based shopping cart. We are looking to have someone integrate Paypal's "express checkout" and Google Checkout as additional checkout options into our pre-existing custom built shopping cart. Our current site / cart uses .net and is written using VB so you must be familiar with them. Our site is currently located at [login to view URL] . PAYPAL: The basic explanation from Paypal says: "Express Checkout uses three API calls during a checkout flow that is optimized for customers who wish to pay with PayPal. Express Checkout offers a "wallet" capability where your customer uses the billing information stored in their PayPal account and does not have to enter payment details or shipping information on your site." To see Paypal's documentation of what you will be required to do as well as developer tools, you can go to these links: [login to view URL] (you'll be doing the EXPRESS checkout, not the STANDARD checkout) [login to view URL] Technical documentation .pdf available here: [login to view URL] GOOGLE: Instructions for integration can be found here: [login to view URL] Consideration will go towards programmers who have previously done this process. Sending us examples of previous work in this area will greatly benefit your chances of getting the job. If we are satisfied with your work, there will be many more new site projects as well as current site additions in the near future that will be made available first to you. Programmers with strong knowledge of the following fields will receive first consideration for the job: asp.net, VB, C#, javascript, MsSql 2005, and html.