Nate,
Your form is pretty good, but there a few things you may want to try.
From your photo, it appears you are leaning forward with your head and your right should is rolled forward a little. Try standing a little more straight up and down. With a more vertical stance, try pulling your right elbow further backward using your back muscles. As noted by moebow, your right elbow is a little too far forward, which means you are holding with your shoulder and not with your back. By holding with your back muscles, it will be easier to get a smoother release becasue youll be able to relax your draw arm.
You may also want to play with a slightly more open stance. For a right-handed shooter, it means place your feet about shoulder width, with the toes of your left foot about even with the middle of the arch or the heal of your right foot. Play around with the open stance to see if it feels any better. You can vary the stance by turning your left foot toward the target. The open stance will give you more more string clearance when you start wearing bulkier clothing this fall.
Your bow arm looks good, but as moebow also noted, holding your fingers on your left hand straight out indicates tension. Try letting your fingers relax against the bow.
If you you can afford it, the video Masters of the Barebow, volume 3 is an excellent instructional DVD that may let you learn good form much more quickly than by trying to learn it on your own. I highly recommend it!
Mike