user81: Is there any Drupal SCI for Bitcoin available? Either tied into Ubercart or, more preferably,  Drupal Commerce.

user145: Closest thing I have seen is  Community Accounting  for Drupal
http://drupal.org/project/mutual_credit
"An all-embracing and flexible package which includes a mutual credit ledger, super-configurable transaction forms and displays, including several views and blocks. It can be used as a digital back-end for paper money projects, or to run an entire LETS, Timebank, or several in parallel. With a little tweaking, it can manage currencies conforming to a wide range of designs. Autopayments can be done with a little glue code."
The only other plugin I know of is the one for OpenCart for bit-pay
http://www.opencart.com/index.php?route=extension/extension/info&extension_id=3119&path=20

user2523: A module is now available for Drupal Commerce : Commerce Bitcoin. Still in Dev though !

user105: You could have a look at uc_bitcoin by Mike Gogulski that seems be what you are looking for. A word of caution though: The GitHub code has not been updated since November 2010, it is for Drupal 6.x (has not been tried on D7) and Mike states that "There’s probably not going to be an update for a long while, either, so fork and code away". Anyway, here's some info about it:

A Bitcoin payment method for the Ubercart shopping cart for Drupal.
Features

Generates a new bitcoin address for every order
Provides payment address to customer on site at checkout, plus in a
  subsequent email
Configurable timeout after which unpaid transactions will be
  canceled automatically
Configurable number of Bitcoin network confirmations after which an
  order is considered paid
HTTP or HTTPS access to bitcoind


There is also a project by Darrell Duane that is based on Mike's project. There is no download available yet and the project page was updated in June 2011.

user2227: Now you can try Bitpay's Ubercart plugin:
https://github.com/bitpay/ubercart-plugin

81: <p>Is there any Drupal SCI for Bitcoin available? Either tied into Ubercart or, more preferably,  Drupal Commerce.</p>
 145: <p>Closest thing I have seen is  Community Accounting  for Drupal
<a href="http://drupal.org/project/mutual_credit" rel="nofollow">http://drupal.org/project/mutual_credit</a>
"An all-embracing and flexible package which includes a mutual credit ledger, super-configurable transaction forms and displays, including several views and blocks. It can be used as a digital back-end for paper money projects, or to run an entire LETS, Timebank, or several in parallel. With a little tweaking, it can manage currencies conforming to a wide range of designs. Autopayments can be done with a little glue code."</p>

<p>The only other plugin I know of is the one for OpenCart for bit-pay
<a href="http://www.opencart.com/index.php?route=extension/extension/info&amp;extension_id=3119&amp;path=20" rel="nofollow">http://www.opencart.com/index.php?route=extension/extension/info&amp;extension_id=3119&amp;path=20</a></p>
 2523: <p>A module is now available for Drupal Commerce : <a href="http://drupal.org/project/commerce_bitcoin" rel="nofollow">Commerce Bitcoin</a>. Still in Dev though !</p>
 105: <p>You could have a look at <a href="http://www.nostate.com/3955/uc_bitcoin-a-bitcoin-payment-method-for-ubercartdrupal/">uc_bitcoin</a> by Mike Gogulski that seems be what you are looking for. A word of caution though: The GitHub code has not been updated since November 2010, it is for Drupal 6.x (has not been tried on D7) and Mike states that "There’s probably not going to be an update for a long while, either, so fork and code away". Anyway, here's some info about it:</p>

<blockquote>
  <p>A Bitcoin payment method for the Ubercart shopping cart for Drupal.</p>
  
  <p><strong>Features</strong></p>
  
  <ul>
  <li>Generates a new bitcoin address for every order</li>
  <li>Provides payment address to customer on site at checkout, plus in a
  subsequent email</li>
  <li>Configurable timeout after which unpaid transactions will be
  canceled automatically</li>
  <li>Configurable number of Bitcoin network confirmations after which an
  order is considered paid</li>
  <li>HTTP or HTTPS access to bitcoind</li>
  </ul>
</blockquote>

<p>There is also <a href="http://drupal.org/project/uc_bitcoin">a project by Darrell Duane</a> that is based on Mike's project. There is no download available yet and the project page was updated in June 2011.</p>
 2227: <p>Now you can try Bitpay's Ubercart plugin:</p>

<p><a href="https://github.com/bitpay/ubercart-plugin">https://github.com/bitpay/ubercart-plugin</a></p>
