Accept Bitcoin on your WP-eCommerce powered website with Coinbase.
Download the plugin here: https://github.com/coinbase/coinbase-wpecommerce/archive/master.zip
Download the plugin and copy the wp-content folder to the root of your Wordpress installation.
If you don't have a Coinbase account, sign up at https://coinbase.com/merchants. Coinbase offers daily payouts for merchants in the United States. For more infomation on setting up payouts, see https://coinbase.com/docs/merchant_tools/payouts.
After copying the files, open the Wordpress dashboard and navigate to Settings > Store. Click the "Payments" tab and then click on "Settings" under "Coinbase."
Then follow the instructions to connect a merchant account.