This isn't really a full tutorial but the following link mentions it in reference to a set of abstraction adventure paseq presets for studio artist 3.5. Some of these use the Texture Synthesizer for paint splatter style effects.
I'll try to get something up on the forum that talks about how to do paint splatter style effects with the texture synthesizer.
"Ok, so your PASeq preset really just is using one paint action step.
So when you go into the paint synthesizer, you can see that it's using path start regionization. The path start generator is the Watershed DM, and the Path type is Path Start…"