A very useful module in D6 days called Admin Role. It attempts to convert the concept of the superuser (uid = 1) to a role; thereby allowing multiple users to be the superuser. Obviously a concept that should be in Drupal core. So much so that in D7 they did included this into core. The downside of this is that they totally screwed up its functionality and despite attempts to get the functionality fixed (Admin role should always provide all permissions (create a superuser role)); no such luck.
Even worse that messing up the fucntionality in D7; the project maintainer for the old D6 module decided to not port his wonderful module over to D7, stating that the functionality was now in core.
So after much whining by myself and numerous others, I decided to simply port the original D6 module to D7.
Unitl the project maintainer sets up a new branch and commits; you may find the module here: http://drupal.org/node/1153626#comment-5813892.