Hahlo beta is the all-new version of Hahlo which will be launching soon. To get a sneak peak at the new version goto http://beta.hahlo.com. Hahlo is a Twitter interface for the iPhone and iPod touch users. You can log in to your Twitter account with your username (not email) and password. Simple as that. Hahlo.com claims that they do not store your login details, and that they are simply stored in a cookie to authenticate you with the twitter service. Try with TestiPhone