Most nurses seem to have the Palm Tungsten E2, the Palm TX, the Palm Lifedrive which is being discontinued, the IPAQ or the Dell. There are more, but I ruled out any that had a phone or camera in case those were not going to be allowed in my nursing school program.
Seems like everyone is happy with what they got. So, it's your call.
I got the Palm TX because it was $225, vs. a lot more for an IPAQ or Dell. The Palm Tungsten E2 is only $150 right now at Circuit City and would be completely adequate, I just got the TX for Wifi access when we go on vacation.
If you just google pda, you'll find more advice than you know what to do with. Or go to Circuitcity.com, search for pda, and then read the consumer reviews on all of them. Also CNET.com has reviews.
I found it difficult to set it up and to download the Skyscape constellation. But I prayed my way through it and got'r done. I don't think you will regret getting one! They were highly recommended by the student nurses at my orientation.
Hope that helps--Tofutti