Great tip! Just constrained it square... looks great. I'll upload it tomorrow. I'm at my 20 pic limit for today :) I try to get away with zero processing on my photos... for better or worse. Everything you've seen on this site so far is straight out of the camera.
I like this. Nice colors stand out against the monotone background. If anything, I would crop it square to the edge of the last flag on the right. If you set your settings to view square thumbnails, you will get an idea of how it balances out that way.
Just my 2 cents :)