Here are three recent 411 developments of note:

Smart 411: Vishwa has released a beta version of Smart 411, a client for the Berry 411 service that runs on any recent Java smartphone. Vishwa’s work is exciting because it will greatly expand the set of devices that can use the service. Give it a try and let him know your experiences.

Sending vCards: You’ll notice a new “Send” link next to white and yellow page results. This will email you or a friend an address summary and vCard that you can add to your Blackberry or PC address book.

Blog search: Technorati’s mobile blog search has been added as a plugin. Just type “t: searchtext” or add “techno” to your plugin menu using Edit Plugins.