Useful formats for the results of a database "audit"?
ER-Assistant. Great ERD, very small and compact. 620Kb total. Its basic plain black/white ERD's but some like that. 

Its free and uses Crows foot notation, but windows only. 

http://highered.mcgraw-hill.com/sites/0072942207/student_view0/e_r_assistant.html

Another popular choice is Workbench from my research. Here is the link.

http://dev.mysql.com/downloads/workbench/5.1.html