callback url to localhost while creating twitter application

edit /etc/hosts file and give a domain name ,like www.localhost.com and give its ip 127.0.0.1
http://groups.google.com/group/twitter-development-talk/browse_thread/thread/6045d0d9ce3f8aea/f23f6aed389a3ae4?lnk=gst&q=callback+url+localhost#f23f6aed389a3ae4