It is pretty much identicle in every way. Armageddon's Wormnet is actually more advanced than WWP's (most probably due to the patching), as it allows you to copy/paste, not be forced to put in a password every time you log onto it, and other interface goodies.
The process for getting it to work is more or less the same too. Team17's forums can be searched for help on that. As for playing, every day or two?