Inkscape 0.46 is drawing close. There's a whole wealth of new features, some of which are incredibly exciting. I've not been using the SVN version since I replaced my desktop machine 5 months ago, so I'm only now discovering what these new features will let me achieve. It's a process of discovering not so much how each tool works, but identifing useful little ways of combining features.
To whet your appetite, here's a two-minute doodle demonstrating a turbulent displacement filter.
Update: here's a more realistic style using a specular lighting filter.