I plan to do some work on the Sirens this Thursday (Feb 18) Friday (Feb 19). It will only be a couple hours but both the sirens and their gateway will be publicly inaccessable.
EDIT : Due to scheduling problems, I will be doing the Siren updates Friday. Sorry for any inconvenience.
EDIT : Sirens should now be back online.
The Roothack Siren wargames are now back up, after some much needed house-keeping and updates. As I speak, Ocyrus is redirecting the dns entry to point back at them.
Over the past couple of years, Roothack.org has been using Vmware Workstation to handle its wargames. We've built up quite a few machines and its getting pretty annoying having to take snapshots for people, revert their boxes, or even install a new OS. It requires us to manually use the vmware gui(pictured below) which has been getting the job done. 
Hack3r.com irc is at irc.hack3r.com
**Update**
I have released rb_hijack-0.1, and it is now packaged as a rubygem to make my life easier, and to make it really simple to install and remove if you wish to
Quick summary
I have written Ruby bindings for libhijack. It isn't a complete implementation of the libhijack API, but it will provide you with the means to attach to a process and inject some shellcode to a PID that you supply from inside Ruby.
It is written as a module, so you can easily mixin it's functionality into your own module or use the module on its own.