Just posted the updated files to the following WePay Plugins:
WePay Checkout 2.2 OsCommerce
WePay Tokenized Checkout 1.1 Oscommerce
WePay Checkout 2.2 Zen Cart
All plugins have received the latest version of the WePay PHP SDK. The code was also slightly cleaned up in the WePay Checkout 2.2 Plugin for OsCommerce.