Clean UI. Like the logo. Don't know why you ask for an additional password beyond FB log in.<p>Anyway, some UI fixes I'd suggest:<p>1. On open, prompt the user for what they are doing tonight with some auto suggestions (and the option to write their own).<p>2. Allow users to upload pictures for what they're doing (people love pictures)... aka social networks don't succeed without pics. At least let me take a picture of the event I'm at or food I'm making.<p>3. "Tag" users does not prompt any users for me (you should pull up my friends list or address book if I haven't added anyone).<p>4. Similarly, if I don't have Facebook friends on here, ask me to invite some.<p>5. Too much unobvious iconography in the app. Tags don't usually imply to people to me but rather keywords. Your edit button is a circle which is confusing. Also, be consistent and use "Go" when I'm inputing stuff.<p>6. Black, White and Blue are really boring colors. Add some flavor to this and make a custom footer UI bar.<p>Most importantly, I agree with dmix in that I need a reason to "cheerlead a new social network". You should provide some kind of incentive to solve the chicken/egg problem.