Google announced some enhancements to OpenID API: First, new popup style UI, which implements the OpenID User Interface Extension Specification, is designed to streamline the federated login experience for users. It's designed to ensure that the context of the Relying Party website is always available and visible, even in the extreme case where a confused user closes the Google approval window. And second is, the extendsion of Attribute Exchange support to include first and last name, country and preferred language.

Full Article: Google Code blog