This something I needed recently, random swirling points along a surface. After trying a few different methods with solvers and pcopen I found a more straightforward method with collisions and advecting by volume. File attached in case it's useful to anyone

Cool, I found minpos to be a nice lazy method too:

http://www.tokeru.com/cgwiki/index.php?title=HoudiniDops#Pop_stick_to_surface [www.tokeru.com]

That's badass, Thanks man!