Marco Arment is a fantastic web developer. He's one of the guys behind Tumblr but I love his side projects even more. Instapaper is a must-use ipad & iphone app for bookmarking great articles. Instapaper strips all the crap out of the page and displays it beautifully for easy consumption. Can't recommend it enough.
His new side project is Preview.FM, a simple way to search and listen to the samples of songs outside of itunes. You search for a band like The XX and you get the screen below. You click the play button and it rolls through every song preview on the album. Quick, easy and elegant. Check it out.