When finishing series of articles about Debian packaging and writing about dbconfig-common, I just had to ask myself, why it is not used in phpMyAdmin package. I did not find any reason and as Thijs did not have any objections, I hacked it together this evening.
So what you will get? All fancy features where phpMyAdmin requires it's database to manage some additional features. For example you can create PDF pages with structure of your database, add additional comments to databases, notice relations between MyISAM tables, etc. Simply see wiki for more details.
Besides this, phpMyAdmin is now automatically configured to use database you choose using dbconfig-common, so you can also connect to remote MySQL server without manually configuring anything.
The only thing which scares me a bit is that we now increased a lot number of debconf questions user has to reply by this...