Here is another one to check out:
http://www.ectaco.com/M218B/
Chinese eBook reader M218B features include:
Support for e-Book contents in English, Simplified Chinese and Traditional Chinese
Built-in Wi-Fi, connecting with wireless network, Chinese eBook reader M218B can download MP3 and PDF files directly, high-speed.
Bookmarks and auto page turn functionality
5-inch big screen. Adjustable font type and size
Resolution and color: VGA 640 x 480, 16-gray scale display.
Screen rotation support for both portrait & landscape modes
Built-in English <-> Chinese, and English, Chinese explanatory dictionaries
Built-in MP3 player that supports background playback
Formats: EBA, TXT, WOF, PDF, HTML, EBAML(EBA2.0), BMP, JPG, GIF, Animated GIF, MP3
Support Flash cartoon format
Support end-to-end transmission, users can copy and exchange files once connecting to wireless network.
SD card slot (supporting 1-4G SD card)
Battery: 2800mAh Rechargeable Lithium-ion. Maximum battery life: up to 22 hours, stand-by time one month. Battery charge time: AC charger 4 hours