The Events Calendar Premium plugin for WordPress enables you to rapidly create and manage events using the post editor. Features include Google Maps integration as well as default templates such as a calendar grid and event list for streamlined one click installation. This plugin costs $32 at present.
Manage event details in the Events post type
Upcoming Events Widget
Provides full template to complement the 2010 theme out of the box (month and list view)
Extensive template tags for customization
Google Maps Integration
Calendar Month view with tooltips
Detailed List view
In Depth Screencast and Documentation included just to be safe!
Includes support for venue, cost, address, start and end time, google maps link
Support for international addresses, time and languages
More info and demo: http://codecanyon.net/item/events-calendar-pro-wordpress-premium-plugin/109301