OK. You wanted C&C so let's see what I can come up with.
It looks rubbish. The water's too dark, the bush in the foreground looks dead, the sky bits are too blue, there is way too much cloud in the sky to be taking photos, those people just don't look like they're enjoying themselves, need I go on?
And before anyone harps, yes I am crappin ya! (should be obvious).
(Oops, just read the bit about askin for totally frank and honest C&C)
Seriously now, a very nice image, one to be proud of, great colours and definition looks great, would love to see a larger version, only two things I would do differently -
1. Pehaps add some more foreground so the horizon is not in the middle (though as I say nothing wrong with it as is, just a different perspective), and
2. Use a Nikon

Nick S wrote:I hope it's like this around the labyrinth in a weeks time..
If it does, you're lost!
I should cut back on my coffee...