Tablets
I have a small kindle that I thought I would use for plates. Yes you can load them, but navigation / finding what you want to see is difficult. You can orient it horizontal, but the normal vertical makes the text too small to read.
I went out and got a 32gig ipad2 with 3G. I was concerened about readability in the RV7A. I did get a glare filter for it, and a foreflight subscription. The forflight app is free and the data subscription is $75/yr that includes all of the vfr sectionals, all of the low altitude charts, all of the plate! Getting the 3g version gets you the gps which geo references the vfr and ifr charts but not the approach plates. You can get a $175 foreflight subscription which geo references the plates.
If you don't want to get a data plan, you can download the data by wi fi.
The readbility is a non issue, the navigation is very easy, and when you are on the ground you get weather for the route you choose.
I am very impressed with both the ipad and foreflight, highly recommended.