I ranted a little on the MU forums about needing a codex for MU. Don't really matter if it is a separate one or if MU specific documents are tagged with wpmu... as long as we have it somewhere structured!!
Before I knew it... I found out that I can contribute... hahaha... speaking too soon! I guess it's like that when one sits up half the nights trying to get some pet projects going. No harm meant!! Now it's my turn to give back!!
Rock on!