Hello owly!
Our "etext" files are in TEI xml in our database, and then transformed into HTML for web display.
This is the list of texts currently available as ePub,
http://litteraturbanken.se/#!epub however we plan to make all our etexts available as ePub by the end of February, 2013. So just hang in there!
All the best,
Cai, editor at Litteraturbanken