If you're slightly technical minded, you can turn a nook color into a standard android tablet with just a few minutes of work. They play nice with PDF files and can access anything available on the Android market. I've been using one for a while. I use LogMeIn to control my server and run VTTs in admin/GM mode as well as run Herolabs.
The Nook Color is 1/3 the price of an iPad, much more portable and upgradeable to the latest and greatest OS.
The Nook Color is 1/3 the price of an iPad, much more portable and upgradeable to the latest and greatest OS.