I don´t have a whole lot to say about this image so I´ll keep this shot. First of all, I don´t really see much rythm in the shot but I definately would have given you the benefit of the doubt and voted as it met the challenge, I probably would have given this a 6. It´s got great colors, both in the baloons and the sky. I don´t really understand why you used noise ninja on this shot, it´s taken at 100 iso and I suspect that created the halo´s around the baloons, something wich isn´t bothering me much but still would have been a better photo without the halo´s, whatever is causing them.
It´s a very pleasant photo to look at, lacks somehing to make it exceptional though, like a killer sunset sky or something but as it is it would probably make a decent postcard.
A thing you can do to avoid the ugly jaggies on thin diagonal lines (a phenomen that is particularly likely to occur when sizing images to the ridiculous limit imposed on us) is to go back with the history brush and remove the sharpening effect from them.
Nice shot. Balloons always look nice. Not sure if you had many options, but the Remax logo sort of spoils the effect for me. Adds a very commercial feel to the scene.