Very much in line with the comments of Fiona on the 3D Brain app (see a few blogs back), but this app gives 3D views as well as slize views. It is very detailed, including all the Bordmann areas with location, function and connectivity (with text information)! Maybe more suitable for our own reference now and then.
According to their website, Brain Tutor 3D uses rendered head and brain models that were created from magnetic resonance imaging (MRI) scans. Have a look: http://web.me.com/rainergoebel/Brain_Tutor_3D_for_iPhone/Brain_Tutor_3D.html