I use and love mine. Palm TX with 2 Gb SD card.
Below are the resources I use commonly. For me it truly is a peripheral brain. I can survive without it but I am alot better with it. Quite often it was a lifesaver through off service rotations and middle of night ICU calls. Instead of keeping a notebook that is hard to modify and organize, all my notes are electronic. Easy to catagorize, easy to modify, and most of all it is always with me.
I have a HanDbase database case log that has every single surgical procedure in it as well as anesthesia procedure that I use to track my cases. I also keep notes on each case type and technique and over several years now have a nice little personalized "Jaffe". Great for quick refreshers when doing a case I have not done in a while.
I have used Plucker to download the entire Nysora website so I can browse in the OR and before doing a technique I have not done in a while.
RepliGo for my PDF viewer for all those PDF's of textbooks downloaded from that Egyptian guy who scanned them all in.
TCPMP for watching compressed movies on my way to work on the bus.
Skyscape programs:
The manual of anesthesia practice - nice snapshot of common procedures
Anesthesia and Co-existing Disease
Critical Care Handbook Mass General Hospital and Oxford handbook of acute medicine - both for ICU references
5 Min Clinical consult for a quick refersher on medical issues and diseases with the Outlines in Clinical medicine for a more in-depth review
Dr Drugs and Rx Drugs for drug dosing and interactions
MedCalc, MedRules and ICUmath for all those forumlas I don't want to remember
Strategies in pediatric anesthesia practice - for those odd peds case I do
Kidometer - for the age specific vitals, normal lab values and development
Aces Texas holdem, Bejeweled, Solitaire, Sudoku for when I don't want to study.
And "List" database program for organizing all my tips and pearls and practical pointers I have collected in practice over the years that I often forget.