The MacCVSClient User Guide describes mainly MacCVSClient specific issues.

There is a host of other documents available both on the web and in bookstores that explain CVS in general or the use of CVS in special types of projects. Here's a short list. It's far from complete but might give you a good starting point.

The order of the items on the list does not imply any ranking in quality or some such. Don't hesitate to email me regarding suggestions and corrections.

Version Management with CVS

by Per Cederqvist et al.; document that comes with the stock CVS sources, available in PostScript, (PDF?), texi, plain text, HTML and other formats; an online copy is at http://www.cvshome.org/docs/manual.

CVS Version Control for Web Site Projects

by Sean Dreilinger; as the title says, this has a particular focus on web site handling with CVS; available formats are PDF, HTML, and PostScript; http://durak.org/cvswebsites.

Open Source Development with CVS

by Karl Fogel; published by Coriolis; this book comes in two flavours: the CVS related chapters are GPL'ed and can be downloaded from http://cvsbook.red-bean.com in different formats; alternatively you can buy a hard copy that contains a few more chapters on Open Source Development.

CVS Pocket Reference, 2nd Edition

by Gregor N Purdy; published by O'Reilly, August 2003; http://www.oreilly.com/catalog/cvspr2.

Essential CVS

by Jennifer Vesperman; published by O'Reilly, June 2003; http://www.oreilly.com/catalog/cvs.

How to Setup a CVS Server

by Michael Amorose; http://www.michael-amorose.com/articles/computers/cvs/index.html.

Setting Up a CVS Server on Mac OS X

by Daniel Côté; explains a number of different ways of setting up CVS servers on Mac OS X systems; http://www.novajo.ca/cvs.html.

CVS Reference Card

by Andrew Ford; a great CVS command reference card for your desk to quickly look up how that odd option was called again; http://refcards.com/refcards/cvs/index.html.

CVS Best Practices

by Vivek Venugopalan; http://www.magic-cauldron.com/cm/cvs-bestpractices/index-cvs-bestpractices.html.

Mac OS X: Version Control with CVS

by Apple Computer Inc. staff; covers SSH setup, repository setup for multi user access, etc.; http://developer.apple.com/internet/macosx/cvsoverview.html.

Sourceforge: Guide to Generation and Posting of SSH Keys

by Open Source Development Network staff; lots of details on how to set up SSH keys for use with Sourceforge. This information can also be useful for users of other SSH/CVS based sites; http://sourceforge.net/docman/display_doc.php?docid=761&group_id=1.

CVS Distilled — A quick guide to using CVS

by Dario Alcocer; http://www.helixdigital.com/cvs-distilled.php.

CocoaDev: CvsBasics

by CocoaDev contributors; a collection of info bits and links mainly focussing on Mac OS X, ProjectBuilder and the like; http://www.cocoadev.com/index.pl?CvsBasics.

All your versions [are?] belong to you: An introduction to CVS

by Mark Dalrymple; introduction to CVS including a number of links to releated information and products; http://macedition.com/bolts/bolts_20021016.php.