from my list of ereaders:
Intel (R) Reader for low vision/blind users
http://www.ctlcorp.com/v4/p-879-intelr-reader.aspx
BookSense text and audio book reader for Low Vision formats
http://www.gwmicro.com/BookSense/Comparison_Chart/
list:
http://spreadsheets.google.com/pub?k...en&output=html
research:
http://docs.google.com/Doc?docid=0AS...emY0em00&hl=en
A friend who has an ipad said they offer white text on black background and maybe a third alternative as well...
I'm legally blind and enjoy the free NLS Bard talking books (tape and digital)
https://nlsbard.loc.gov/ApplicationInstructions.html
If you haven't heard of it it is a nice service
There's also
Recording for the Blind & Dyslexic (RFB&D) offers an online catalog of the best audio book and audio learning opportunities on the internet.
www.rfbd.org/ (free)
For the disabled, Bookshare leverages the collections of individuals who scan books. Braille books and tools for downloading.
www.bookshare.org/ (not free, but some libraries have a small assistance program)
American Foundation for the Blind (AFB)
www.afb.org/
has forums for technology and books that might be of interest