This plugin is able to handle the wordpress login using the authentication of OpenERP 6.1.
Before install the plugin: you have to make sure your host provider, may open the port on which works OpenERP. for example, youraddress:port/xmlrpc/, port must have the privileges to do to pass the data in both input and output.
In the administration section, each option has a description of its properties.
There is also help section, read this section before use this plugin.