Findings:

• robot guest user (user)
• edev: I Shot Guest User (but I did not shoot n-a-t-e)
• George Guest
• the guest from the future
• guest at g.i.shower (user)
• Guests of the Sheik
• Yellowed lamp shades in the Guest bedroom
• guest soldier program
• guest bedroom
• Guest Host
• I'm sorry sir, but it appears that the abyss hasn't put you on the guest list...
• special guests
• Zeit's Guest (user)
• Guest Front Page (fullpage)
• guest of honor
• God was a Lost Guest
• We stole the guest list and replaced it with our own
• Truly Madly Deeply Fallen Quest Guess Guest Testing Best List
• The Summer Guest
• Unregistered Land
• Bilbo Baggins' Farewell Party Guest List
• Guest
• Guest rope
• Sally guests I have known
• My November Guest
• Cleaning for Guests
• The Doubtful Guest
• Christopher Guest
• Guest User (user)
• When Jet-Poop nuked guest user
• The 7th Guest
• Dorothy Receives the Guests
• edev: Guest User messaging fix
• edev: Misc. Guest User bugs
• Everything you like and the guests we'll feed (because you are, that's why)
• Fast food restaurants shouldn't call people guests
• permanent guest host
• The Three Unrestricted Guests of Arthur's Court, and The Three Wanderers
• Dracula's Guest
• guest (user)
• Guest Star
• %Guest User (user)
•  Guest User (user)

If you Log in you could create a "unregistered guests" node. If you don't already have an account, you can register here.