Sorry no one answered this, but Nathan seems to have disappeared, and the forum isn't very alive now that it's at LQ

I imagine you've probably checked it out by now, but if you still want to know, the only thing I can find on this is
http://grafpup.org/news/?p=97
I think this is still true for Grafpup 2 final, as it has lxpanel 0.1.1, which seems to be quite old.