How can I get started building a bicycle? Now that I've been riding a while, I'm interested in building my own bike.  In this case, it will be a bike for commuting and getting around town.  It will probably be a flipflop fixie/single gear, but the kind of bike isn't important to this question.

What resources (books, web sites, magazines, shops) do you recommend for information about building a bicycle from scratch?
My main resources for pretty much anything include:

Sheldon Brown
In particular:

sheldonbrown: how-to-fixed-conversion

sheldonbrown: fixed-conversion

Loads of general wrenching info at
Park Tool

And of course a friendly local bike shop. 

Look out for a bike co-op or skills-sharing non-profit/community organization. They may run classes and provide parts and tools.