Automatic Login to WordPress, Connector, etc.

My company has built a website

And what application or CMS was used to do this?

We would like to allow the users to use their username and password (from our website) to login to their existing WordPress blogs – whether the blog is co-hosted or one they have installed themselves under their own domain name.

Perhaps you could elaborate on this. Don’t understand why you say you would “allow” them to log into their “own” WordPress blogs or “own” installations from your website. Why do you want access to their blogs? If owners give password and username of their installs, someone with access to usernames and passwords can go in and hack the blogs.

… this is a convenience thing we are trying to give them … if we can allow our users to use their username and password from our website to access any site that requires a login…

With all due respect to what your company is trying to do – make it easy for users to remember usernames and passwords – personally, it sounds more like an issue of CONTROLLING your users blogs and social networking materials. Assuming your users are submissive or inane enough to do what you ask of them, your company will have complete ACCESS to all user data and even to the point of taking over the users applications. Again, you mentioned “allow” – it smacks of another agenda altogether to me – benevolent dictatorship – and that’s my feedback 🙂

On another note, if you want that kind of control and access to user information, set up WPMU with BuddyPress and host the blogs in your own server plus the social networking factor is already included. If you are the Site Admin – a kinder benevolent dictatorship is already set up in an opensource application 🙂

Actually no plug-in will accomplish what I need to do

True, the plugin list I gave was just a reference for your programmer to see how others have bridged their applications to WordPress.

I’ve installed WordPressMU

Welcome to WordPress.