I have also recently joined, or rather I sent my money in, but received nothing. Further down the line after emailing various members, it seems that there was some kind of dispute within the organization, which is being rectified.
I am now in the process of sending in my application for the second time, to Sid Morrison, the current membership secretary.
At least I am getting emails back, so perhaps things are improving.
The web site is full of useful info, and I thought that making contact with other 100km members, could well prove to be a very useful resource.
Happy running,
Paul.