Here's A Great One from NewsForge by Joe Barr.
Over the past year, the Howard County (Md.) Public Library has migrated more than 200 public PCs from Windows 98 and Windows NT to Linux. These PCs are used both to surf the Internet and to access the library's catalogues. NewsForge recently spoke with Brian Auger, associate director of the library, and the IT team responsible for the migration. They wanted to learn more about why and how it was accomplished, and how pleased they are with the results.
Everyone appears to be happy with the results: patrons, IT staff, and management.