The rodbuildingforum mentioned is a great source of information.
Tom Kirkman's book on rod building, the previously mentioned Flex Coat book, and Dale Clemens book on rod building are very good. There are also a few good videos in DVD format out on rod building that are worth a look.
Things like good quality pre-formed rod grips, reels seats, guides, glues, etc. are best gotten from one of the vaious rod building supply stores.