The ledmacs package has been updated at tug.ctan.org, and will soon work its way to your favorite local mirror.
This package by Peter Wilson is for typesetting critical editions. I can be found in macros/latex/contrib/ledmacs. A .pdf version of the manual has been included.
Thanks for the update, Jim Hefferon ftpmaint@tug.ctan.org
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From the README file:
The ledmac package is for typesetting critical editions. It is a LaTeX port of the plain TeX EDMAC and TABMAC macros.
Users are warned that the package is still experimental. Do not rely on any part of it. Bug reports and suggestions will be welcome.
Changes in version 0.2 (2003/08/16) o Added indexing by page and line number o Added simple tabular- and array-style environments