WORKS ON BOTH UPDATED AND NON UPDATED HTC EVO's AND NOW ROOT STICKS EVEN AFTER REBOOT SO GO GET NEW VERSION
In your browser you can go to http://www.unrevoked.com or with your phone you can go to http://www.unrevoked.com/m Their easy root is out right now so go and get it..
Remember to uninstall then reinstall
v1.1 Root sticks on reboot
v1.0 root aquired