There should be a section available to users where they can add comments about their collections. Like say:

"Box 1 has New Phyrexia commons"
"Box 2 has Rares and uncommons from blahblahblah set"
"I put Box 1 and 3 in the closet next to the cat litter"
"Traded Blahblah for a blahblah with somebodyblah from school on 15Aug2011"

etc...

I think we should be able to have personal notes about our collections if we want to