They got a demo out.
files.filefront.com/Hellgate+London+Demo...28967;/fileinfo.html
Problem is, I can't seem to find where the MMO goes into it. It just seems like a regular FPS that meets Diablo.
I could be wrong though and that they never included the MMO part in this demo.
Also I notice they already got a Key placement bug. I use to Arrow keys

so in order for me to jump, I place it as shift. But with there key placements you need to combine shift or ctrl keys with something else.