You can read a lot of on-line files on Sony Readers, just make sure they use Adobe DRM if they need security and they are in the following formats;
Book
EPUB file (.epub file extension)
EPUB (OPS version 2.0) supported
PDF file (.pdf file extension)
Support is based on the PDF 1.6 specification.
BBeB (.lrf or .lrx file extension)
Text file (.txt file extension)
RTF file (.rtf file extension)
Word file (.doc or .docx file extension)*1
*
1 In case of using Windows, you need Microsoft Word
installed on your computer. Word files will be
automatically converted to RTF files by Reader Library
during transfer to your Reader or a compatible memory
card.
