Use Old or Unsupported Scanners with Mac OS X

The SANE TWAIN library of scanners has a set of packages that can help you use your old or unsupported scanners in newer versions of Mac OS X:
http://www.ellert.se/twain-sane/

Some comments:
http://www.macosxhints.com/article.php?story=20091216155248868#comments