HGTV has a show called 'Before and After'. They have documented a few split-level conversions and updates. A couple nice things are that they list the architects/builders contact information and show floorplans. Most of the pictures are small but you can get a general idea of the finished look -
http://www.hgtv.com/hgtv/episode_archive/0,1783,HGTV_3818_26,00.html