Slightly OT: Where to find a good reference on building indexes?

[Theresa de Valence]

Hi Framers,

I'm just beginning a new project which will require building indexes 
(indeces) and I want to improve my understanding of how good indexes are 
built. What should I be looking to accomplish? Where can I find some 
examples of really well-done indexes?

I've ordered IXGen from Frank Stearns (fsatools.com).

Thanks in advance for your advice.

Cheers,
Theresa de Valence