I've created a mixer plugin for Electrum to support in-client use of the blockchain.info mixer. It's not quite standalone as Electrum doesn't really support dynamic loading plugins (which would be a nice thing to work on someday), but the changes to the main program are very minimal to hook it in, and the plugin itself is very simple.

It gives you two new features. A button to request a forwarding address when you send coins, with mixer fee estimate, and a right-click menu option for a forwarding address when showing a QR code for a receive address. These simply make an API call and present the address for the user to confirm.

This plugin will not be integrated into Electrum main line because the devs feel it maybe endangers the project by having a mixer associated with it. I feel it improves usability for those who want more privacy and may be a useful stop gap until the Dark Wallet guys finish up their work.

The plugin is available to anyone who wants to use it in a fork I created just for this purpose, in a branch called "mixer" based off the current master,

https://github.com/tkhaew/electrum/tree/mixer see below


Have a look if you're inclined and comments are welcome.