Hi Guys,
Loic originally submitted this patch some while ago, and I think that implementing it would be a good idea to make life easier for the high level sysadmins. I haven't tried to apply it against the tree yet, but just a few ideas I had on it that I would like to mention.
First, this would need ideally get it's own database to run against, say 'phpMyAdmin' (I already have such a database for my bookmarked queries). In addition, there is a lot of extra things that could be implemented best with a proper database instead of using the configuration file still. Feature #484158 is a good example of something that would become a LOT easier to implement with such a system available.
If everybody else thinks that such a large scale feature would be appropriate in phpMyAdmin, I would be willing to implement it, as I have a newfound need for it myself.