Wordpress developer with experience or know-how of s2member plugin

We are looking for a Wordpress developer with experience using s2member.

We have a Wordpress multisite and would like to have a single sign-on created, so that users can:

1. log into one website and go to another site within the network without having to log in again
2. remain logged in when they move from one website in the network to another.

The plugin developers have confirmed that this can be done, and have provided details to find more about making this patch/hack:

Each Child Blog has Users that “belong” to that Child Blog. So while the database of Users is shared across all Child Blogs, each Child Blog has it’s own users associated with it, or not.

That being said, s2Member does support API Functions like current_user_can_for_blog(), so you might take a look here in the s2Member Codex to see if you can use one of these API Functions to your advantage.

See: http://www.s2member.com/codex/stable/s2member/api_functions/package-summary/
See also: http://codex.wordpress.org/Function_Reference/current_user_can_for_blog

Please get in touch if you can complete this by Monday 5pm (UK time).