This is very exciting. The site looks great from the outside. :) Having an 5th grader myself I've often thought about the potential for dotLRN in primary education.
I'm sure many people would be interested in how the UI and functionality is being used in the K-12 environment and any case study on how students of different ages are using it and parent/school communication would be wonderfull.
Is there anyone at the school who would be willing to serve as a reference when other K-12 schools express interest?