Ohio State University Medical Center developed programs on the iphone and ipod touch for medical students and physicians. Used for education of med students as well as patient care. iMurmur: your guide to heart sounds, lectures as pod casts, access to online databases such as pubmed are a few examples of utilization of these devices. Have a look at the video to see some examples.
Good wifi connection in the hospital ensures quick delivery of searches like a wireless laptop.
Thanks David Rothman who also co authored a very interesting book: Internet Cool Tools for Physicians, reviewed on this blog.
For medical apps for iphone and ipod touch have a look at iPhone Clinical Reader