Wikis are motivating:
Ghost Cadet
iPod Touch Reviews
Math Tricks

Wikis allow us to share our passions:
Tower Bridge
Silhouette Ideas

Wikis are fun:
Comics and Fun
Student Game Pages

Wikis mostly provide opportunities for kids to be a silo, do parallel play, or have conversations:
Probability Preassessment
Landmarks and Math
Emma's Politics Page
Spring Break

Occasionally there's collaboration:
The Old Crozet Bell
William's Video Game Hub