I am the site founder. I would like to add what makes our group a little unique is that we focus on providing physical resources to actually use the tools we learn about. Members are given VPN access to our "Playground" where there's a number of servers, services and devices that help people learn while obeying the law. All hacking is executed in this isolated LAN.
Eventually, we would like members to setup and build their own nodes to form a clustered network, expanding the size of our playground while making it more fault tolerant.
While we are far from experts, we enjoy this topic and excited to learn new things.
To the authors of EH-Net, kudos to you all. I hope our project at Group51.org is 1/10000000th as successful as your site. Keep up the good work.