How to motion blur particles with blob shader?

[mokz]

Hi everyone, I have the experience CD and I want to try out the particle system, but I can't seem to find any doc on how to motion blur the particles while using a blob shader. For example water flowing out from a shower.

I did a search on the web and the only thing I came close to was a XSI customer talking about using a script for motion blur.

Can someone give me some pointers?

Thanks
James