Organizing many CVS projects: How to?

[James Knowles]

We have a large number of different projects for different clients as well
as in-house development.

I've struggled a bit to figure out how to best set up CVS to handle these. I
can create a zillion projects under a single CVSROOT location, but that very
quickly gets messy. However, it does have the nice benefit of only one
$CVSROOT environment variable. 

Is it advisable to organize these into separate directory hierarchies, doing
a "cvs init" on each? Does this do bad things? 

Are there any specific strategies? I'll admit that I'm used to Visual Source
Safe organizing projects in a single-rooted hierarchy. 

Any ideas welcome. 

Thanks!