Photo via gmpicket's flickr. In one of life's crueler ironies, it's usually either extreme heat or extreme rain that forces people to stand sweltering on a subway platform or out into the drenching elements. Today it's the former: subway service is still a disaster on several of the city's lines. Residual delays still exist on the F, G, and 7, but the MTA has sorted out the trouble on those lines with the help......