Good start. A couple things:<p>1) If its a password field, make it a password field. Typing in a password and seeing the text is a little weird.<p>2) When typing "@name likes blah," it becomes obvious when viewing the topics that you use @ as a delimiter and just take whatever is before it for the note, as the note was empty.<p>3) Try to make the input more robust - such as allowing name first, most of the time people will want to type in the topic (in this case, the person) first.<p>4) I'm sure you are working on it but a more informative interface about the notes you've kept would be nice. If a person is socially awkward they may not even remember names - much less who they've put in the system.<p>5) I'm not sure what your proficiency with HTML is or if you were just lazy because this is a throw-away app, but I'd look into doctypes and W3C validation. You use an xml style line break so I get the feeling you know a little about it, but for such a simple interface there shouldn't be any reason to have 25 errors on it.<p>I hope this criticizing wasn't too harsh - I aim for it to be constructive.<p>Neat idea too, I know a guy I work with that could totally use this.