A 'hackish' device
Hi, even if the tablet isn't that smart / portable as a smartphone, it offers great possibilities for visualisation and input while keep it with you. So 'hackers' might be interested in tweak the device to meet their needs and make it work in pretty new scenarios. So they will be interested to manipulate/extend two essential parts:
software
This will cover all layers (apps..OS...drivers). Please try to make everything as modular as possible and allow where possible
- plugins / scripts
- simple languages as python, JS, ...
- extended harbour (GPL compatible, like a garage that is helpfull for request/start/maintain ports of existing tools and to crowdsource actions (e.g. contribute translations, skins, ...))
hardware
If you learn from popular hardware platforms (arduino, raspberry,...) And even the Openpandora, and n900 of course:
A lot of stuff had been covered already (USB ports, open bootloader and drivers) and the other-halfe shows nice possibilities for smartphones. So a simple expansion slot and a easy way to access it would be pretty cool :-)