Love your comments on jQuery Rey.  Here's how I'd do it.

function jsonFlickrFeed(o) {
	var str = '&lt;div&gt;', i = 0;
	while (o.items[++i]) {
		str += '&lt;img src='" + o.items[i].media.m + '"&gt;';
	}
	str += '&lt;/div&gt;';
	$('#main').append(str);
}