Motivational talks etc only work for a short time in my opinion , I have been to loads , then the ra ra ends and you go back to work to apply what you have been shown and then ......
The eternal cynic maybe.
A better bet is to get that mundane code done by some tool and get on with the intersting & fun stuff. Employers should equip all developers with cool tools like SQL Prompt , and for code genration one of the many generators , like Codesmith . A data layer from any db in seconds , customised to your style and needs. Then add in a VS Sddin if you a C# / VB Developer like Visual Assist X .
All you have to do then is THINK and be creative , the mundane stuff just happens.
Like any tools , the 28 days eval simply scratches the surface , buy in and get the full advantage , they may not be cheap but neither is replacing demotivated staff who may leave through the mundane.
PS -- I have no connection with any of these tools other than as a user
Mike