RSnake (ha.ckers.org) has posted a nice list of purposely vulnerable sites, apps, and other ways to challenge one’s hacking skill. I have a small list on the right menu “things to do” section. Maybe someday I’ll go through his and transpose them to my menu, but for now a simple single link to his will suffice.
This really just reminds me that there ought to be 36 hours to every day…and I also see some of my links are now defunct. Ick.