I build an set of distortionfilters based of the smudge:

Download from OCAL
http://openclipart.org/people/Chrisdesign/Chrisdesign_Distortion_Filter_Pack.svg
An example of the Wavefilter:

These are pretty neat. I notice though that the image won't display in Batik, because the 'feDisplacementMap' elements have no 'in2' attributes. If the filters were made in Inkscape, this needs to be reported as bug, since 'in2' is required according to the spec, and the displacement map doesn't make sense without it (as it's the 'in2' that specifies the displacement).

They are very very cool

Thanx !
Sas, the filters are made in Inkscape but i don`t understand fully what you say about the In2 spec-bug. I`m just an WYSIWYG user.