The package below has been updated on tug.ctan.org and should soon be at your favorite mirror.
Thanks for the contribution, Jim Hefferon Saint Michael's College
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The following information was provided by our fellow contributor:
Name of contribution: microtype Author's name: R Schlicht Location on CTAN: /macros/latex/contrib/microtype Summary description: An interface to the micro-typographic extensions of pdfTeX License type: lppl
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Changes in version 2.1: ========================
* The package letterspace.sty now really works * New command lslig to protect ligatures in letterspaced text
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This package is located at http://tug.ctan.org/tex-archive/macros/latex/contrib/microtype . More information is at http://tug.ctan.org/cgi-bin/ctanPackageInformation.py?id=microtype (if the package is new it may take a day for that information to appear). We are supported by the TeX Users Group http://www.tug.org . Please join a users group; see http://www.tug.org/usergroups.html .