Lots to see here. I started coming to Sweden from UK in 1996 (after 2 Coast to Coast walks) :) and moved here in 1998.
Kungsleden is one of the more rugged trails 430km in fjällen (the fells/mountains)
http://www.vimeo.com/28984128
Others include Sörmlandsleden
http://www.sormlandsleden.se/default.aspx?langID=1033&showmenuid=0
If I can help with information, photos etc, email me on cwmhaffes at gmail.com
Rest assured that I have no commercial interest in any of this! :)