Nice motiv me thinks, but ... (there's always a but isnt it
a bit on the dark side and playing around with the unsharp mask wouldnt hurt either.
When I look at the dimensions of your file i would assume its straight from a digicam maybe downsizing it to 1024 * something would help. I have downloaded the file and played around a bit with Photoshop. Check your E-Mail!
Maybe you wanna post it here bacuse i dont have access to my webspace from work!