Quote - It's cool to see it being used already.

Well it's used since the very first version posted. And once the word spreads and the more timid ones hear it doesn't require a PhD to be used, I'm sure there will be a rush.

Quote - I'm not going to bother with the server for the moment. You'll just have to push two buttons - one to launch the GUI so you can change parameters, and another to export and render.

I fully agree. I don't think pushing two buttons is too difficult, automating that could be postponed all the way to the final polishing; It's about as urgent as skinning.

Quote - Right now I really want to get the GUI integrated so people don't have to deal with the LuxRender scene file at all.

From a users PoV, being able to change render settings and set up lights (and -types) otherwise than by editing the Lux files is indeed the step missing to be able to consider it fully functional for the layman.

Suggestion for the GUI: Would it be possibile to have a small tooltip stating what each parameter does? Copy/pasting from the succinct Lux manual on their site would be fine.
Because I guess there will be a big wave of cluelessness breaking down on most Poser users... :-D