We've launched a Bitcoin payment button on Magento called Blockonomics Bitcoin payments.
Here is the link - https://marketplace.magento.com/blockonomics-module-merchant.html Feel free to check it out.
FYI Overstock.com is one of the biggest sites that accepts Bitcoins.
If you have any doubts and need help to get started with the integration, I am available at email@example.com
VP, Global Sales,
I would like to share a payment module that was development to receive amounts using the Bitcoin cryptocurrency via Blockchain.info wallet for the Magento platform version 1.
The module has automatic update of exchange values for Bitcoin, transaction management, blocks, automatic billing and Bitcoin currency price display in the store.
In addition, payment addresses are generated in a unique way for each customer using the QR Code format.
The link to the module project is: https://github.com/gamuzatech/gamuza_blockchain-magento and any feeback will be very gratifying.
Any doubt I am available.