I have the script ready for distribution when the BTC is ready.
Includes:
Dynamic BitcoinPayFlow Library (bitcoinpayflow.php)
BitcoinPayFlow Test (payflowTest.php)
Callback using SHA2 for verification (callback.php)
BTW, their documentation is seriously lacking content. I have written 100's of API libraries and you always get a clear indication of the API url...
EDIT: Open Source - See sig
Thanks a lot for doing this. I'm going to try and incorporate your wrapper into an OpenCart plugin, when I do I'll open source it as well.
Simon