When I am doing something in a schema of tables I want to have a list of changes to put in svn, and execute it by another members of the team. As I understand, there are 2 ways: extract from logs, or implant some code inside phpMyAdmin, maybe there are other ways without coding?
well - you can periodically run
diff it with previous dump and if needed commit to svn. you might want to add some info who was recently accessing phpmyadmin [ if you use httpauth - you could extract it from apache logs with some hackery ].
anyway - analyzing mysql logs seems most reasonable to me.