There's a package for that called accounts-wordpress on Atmosphere. However in the package readme it says:
Not ready for production.
So it's up to you to decide whether or not you want to use it.
You could however create your own package. This is relatively simple. Take a look at the other accounts-* packages like accounts-twitter that uses the twitter package. Wordpress provides you with API documentation that you can use while creating the package.
Hope that answers your question!