Sorry to rain on your parade Jason but Ray had to make changes to our website last night because there is a section within the eCart code that specifies SSL3. This was relating to integration with Cardinal Commerce where you have 3D Secure or SecureCode security checks on Visa and Mastercard transactions.
You also need to disable SSLv3 for the cURL library though, as you've said.
Can I also advise caution when adding <?php @session_start(); var_dump($_SESSION); ?> to your failure page. This exposes all of the card details on screen and we had a client forward a screenshot of the failure which, of course, contained all their card details! :(