Yes, Zackscape is back, has been for a short while.
Its not the same as the "Old" Zackscape, so im told.
since i never actually played back then.
What problem are you getting with the webclient?
I have issues with the webclient too.
What i find to work is, if you load up as normal: http://zackscape.darkbb.com/forum
Just simply take off the /forum and it seems to load for me.
Let me know if your having anymore trouble connecting.