From Radiuz Networks:
Radiuz is a Wi-Fi security service that helps people build safe, accountable, and flexible wireless communities using the WPA Enterprise security standard. Members can control the exact level of access to their network by friends and strangers. If they choose, they can exchange Wi-Fi access with other participating members around the world in the world's first "cooperative Wi-Fi network". As the cooperative network grows, members will be able to access the Internet from just about anywhere. The Radiuz Wizard automatically configures Windows XP wireless settings to work with Radiuz.