I now something abotu most of the names on the list:
Ditto Book - otherwise unexceptional reseller of Netronix
Entourage Systems - DC area, developing its own product for the education market
HanWang - (hanvon) Chinese manufacturer of a couple of really neat readers
Interead - seller of the Cool-er (rebranded Netronix)
Liquavista - screen technology
Onyx International - maker of Boox