The Colorado Library Consortium created a project to clean up the most popular MARC records from Project Gutenberg called eDiscover the Classics. We identified the top 500 or so downloads and cleaned up those records and made them available to other libraries. We launched the website a few weeks at: http://www.clicweb.org/e_discover/e_discoverhome.html
Since that time the records have been further enhancements by Douglas County Libraries and University of Denver. If you have already downloaded the MARC records we encourage you to get the new set of records and reload them into your catalog. Here is a link explaining our clean-up efforts.
Please consider these MARC records a gift to the library community! The more patrons think of libraries as a source for content for their Kindles, Nooks, IPads, MP3 players, etc - the better!