The crackthe.net domain is not for sale. I've used this domain name since March 2010 as both my personal domain and originally for quite a few projects I was involved with.
Even though most of those projects have spun off into different domains of their own now (www.derivare.de), I'm still pretty attached to crackthe.net as my personal domain.
If you have any questions, don't hesitate to get in touch:
crackthenet _at_ nym.hush.com