Unzip in .NET

I'm working on a plugin for .Text and I decided it made the most sense to work with ZIP files.  The problem is, no built-in support for Zip (without resorting to J#).  Well, after much searching I found Sharp Zip (http://wiki.sharpdevelop.net/default.aspx/SharpZipLib.SharpZipLib).  Cool!  It looks like it will fit the bill nicely though -- based on the Java Zip libraries.  I searched GotDotNet workspaces, Sourceforge, and general Google without finding any free options.  Finally this entry by Andrew Stopford pointed the way.  You just need to be tenacious!