Edit in JSFiddle

(function( twitter, $, undefined ) { 
    var _selection;
        
    twitter.init = function( $selection ) {
        _selection = $selection;
    };
    
    twitter.displayTweets = function( tweets ) {
        var $list = $( "<ul/ >" );
        
        $.each( tweets || {}, function( index, tweet ) {
            var html = "<i>" + moment( tweet.created_at ).fromNow() + "</i>: ";
            html += "<b>" + tweet.user.name + "</b> - ";
            html += tweet.text;
            html += tweet.retweeted ? " <i class='icon-repeat'></i>" : "";
            html += tweet.favorited ? " <i class='icon-star'></i>" : "";
            
            $( "<li />", { html: html }).appendTo( $list );         
        });
            
       _selection.empty().append( $list.children() );         
    };

}( window.twitter = window.twitter || {}, jQuery ));

var tweets = [
    { id: 0, created_at: "Mon Apr 11 8:00:00 +0000 2013",  text: "Test Tweet 1",
     favorited: false, retweeted: false, user: { name: "User 1" } },
    { id: 1, created_at: "Mon Apr 11 9:00:00 +0000 2013",  text: "Test Tweet 2",
     favorited: true,  retweeted: true,  user: { name: "User 2" } },
    { id: 2, created_at: "Mon Apr 11 10:00:00 +0000 2013", text: "Test Tweet 3",
     favorited: false, retweeted: true,  user: { name: "User 3" } },
    { id: 3, created_at: "Mon Apr 11 11:00:00 +0000 2013", text: "Test Tweet 4",
     favorited: true,  retweeted: false, user: { name: "User 4" } },
    { id: 4, created_at: "Mon Apr 11 12:00:00 +0000 2013", text: "Test Tweet 5",
     favorited: true,  retweeted: true,  user: { name: "User 5" } }
];

$( document ).ready( function() {
    twitter.init( $( ".tweets" ) );
    twitter.displayTweets( tweets );
});

<div class="tweets"></div>