www.diystompboxes.com
www.experimentalistsanonymous.com
www.geofex.com
www.generalguitargadgets.com
Those are the my favorite pedal related websites. BYOC is like painting by numbers of pedal building IMO, and the best way to learn it probably to build a simple boost or distortion from DIY or GEO and then go from there. I just don't like BYOC because you have to pay them for every project you do.