This might be more of a Cygwin than Latex question, but I don't know. Is there a convenient way to find and open the documentation for Latex packages within Cygwin? The only way I could think of is to do a Windows search all of my Cywin install directory for pdfs, but I figure there must be a better way. Is there?
As mentioned in the comments,
texdoc is the way. The binary is included in our cygwin builds, as one can check in the svn repo http://tug.org/svn/texlive/trunk/Master/bin/i386-cygwin/
texdoc works practically out of the box, just call it with a package name or file name and in most cases will find documentation.
If you need more help with it, call
The search function in the Cygwin package manager doesn't find texdoc, so I bit the bullet and installed everying under publishing (i.e. Latex related) along with with all that bloat. Somewhere within all that jetsam and flotsam was the nugget I needed, namely texdoc.
After editing the texdoc config file and installing xpdf, It worked!