iRex have now released the information on its new reader:
http://www.irextechnologies.com/irexdr1000
I found this statement especially interesting:
The chargeable built in Lithium Ion battery has sufficient power to last for days.
And:
The iRex Digital Reader 1000 series, will offer three products within the range, from the DR 1000 basic reader version, the DR 1000 S equipped with a stylus for writing which can serve as an unending notepad, to the DR 1000 SW with stylus, plus WIFI and Bluetooth connectivity.