My iPhone just crashed. I clicked on the iTunes Remote app, the phone went to the "silver apple" screen, which I think is the restart screen. It stayed there for a very long time. I ended up doing the reset sequence -- holding down the sleep/wake and the home buttons for 10 seconds or more, which also shows the silver apple screen. It stayed there again for a long time. It maybe coincidence but when I plug the phone into iTunes it went into "sync" mode.