I use a 27" EIZO calibrated monitor as a base. It's not cheap, but the calibration makes a big difference to uncalibrated monitors.
When I'm out with friends, I use my iPhone screen to show photos on the fly (I suspect they hate me for this :cool-1

. What I miss the most on the iPhone is the mouse-hover animation. This is not a limitation of Astrobin's mobile application, but an inherent feature of the iPhone interface. When a mouse is connected to the iPhone (yes, you can, via bluetooth) the hover animation works! I don't know if using a pen would produce the same effect, has anyone had this experience?
Thanks for this interesting thread and poll, Daniel.
CS, Mau