I have had similar experiences.

I recently designed a web-site for my Operations team that condensed our entire day's reporting/checking into a five minute "click-fest". To this day, no one, other than a few co-workers, have done anything but complain that my site is not 100% MS Exploder compatable.

I look at it this way. It makes my job easier, and once I move on to a different position and/or company, the only way that app will get updated is if they hire me as a consultant!

Unless your app has some commercial viability, use it to make your job easier, don't splash your name around too much (unless it will get you a raise) and just "don't worry, be happy".

-cyb34r