Jessica is active on one of the photography forums I belong to.  The forum owner tried to duplicate her technique, but couldn't (and he's a whiz at Photoshop).  It's more than just applying a filter; she does a lot of detail work on these art pieces.  She also sells beautiful templates for albums, cards, etc.  You can visit her blog at jessicadittmerphotography.typepad.com/midnighthourdesign/