Nice shot! I really like the angle here, it gives a real sense of scope. I had no idea it was Martin Place till I read your description. O_o I'll have to walk along staring at the sky when I go catch the train this afternoon, to try to figure out which part this photo is of.
Gorgeous sky! I'd like it if there was a little more of the buildings visible, to give it a bit more sense of depth and how far away the sky is, but I suppose you can't have as much sky if you do that, and I love the rich colour and texture up there, so I guess you can't have everything! Lovely photo