Saving S Note notes as HTML
If you are trying to convert your S Note files (*.snb) to a HTML format, the easiest way would be to first convert SNB to PDF and then use any of the existing PDF to HTML converters to get your *.html files.
Exporting Shanda Bambook to HTML
Calibre ebook management program supports many ebook formats including the SNB. Simply use it to convert your *.snb Bambook to a HTML document.