For guys looking into the CCNA, check out the book (or e-book) by Todd Lammle (sp?). I devoured it one summer (after taking a crappy Cisco class in high school) and then conquered the exam. Of course, you'll still want to have a virtual/real router to play with for lab purposes. Anyway, Lammle's book made everything so clear and easy, and it got me the CCNA at age 16. ^_^
From what I can tell, it's an RPG... not an MMO, am I right? It's amazing how many platforms it's being released on: "[...]will be released for the Microsoft Windows, PlayStation 3, PlayStation Portable, Xbox 360, Wii and Nintendo DS platforms"