It would be great if there were a tool that you could use to purge your action logs from time to time. It would need a way to choose which log to purge and when to purge it from. When you have the logs on it can make that table pretty big pretty darn fast and slow things down. Right now we do this via MySQL, but a tool that lets the library staff do it themselves would be great.
"misc/cronjobs/cleanup_database.pl" can already do this. However, it could be interesting to have a BackgroundJob in the staff interface that lets a library admin delete old action logs. Seems like it's more of a job for a lower level sysadmin though.