I just bought the cheapest tablet/ereader I found at a bestbuy. http://www.bestbuy.com/site/Velocity+Micro+-+Cruz+Digital+Reader/1372631.p?id=1218253818654&skuId=1372631&st=Velocity Micro &cp=1&lp=1
They just dropped $20USD from yesterday so I called in to price match. Crazy cheap. I can't install much apps but it surely beats Kindle DX with 3G. I can browse the internet, read emails, watch some crappy youtube videos, read pdf txt, doc, xls,etc. Not bad for $100. I know it's not gonna be an ipad but with the difference of >$400, I can get myself accelerometer, a mega1280 clone, maybe a duemilanove clone for a friend, and do this again for about 3 more times if I will. ;D I think instead of repeating I will prototype more boards and else.
Edit: I was able to make some upgrade to this ebook so that it can access the android market and overclock. Now PDF files are much more readable and I'm happy with it.
The screens i had were that bad. With the single new one i can keep the windows smaller and end up with more on screen. You are right with the numbers though.
Want to use it for my snail mail notifier currently working on making it work for android too, and not only the iPhone push, but seems to be a lot more tricky with android.