Here are a couple of links which I'd recomend to any budding Chaos Dwarf general or anybody who just want to know more about the army.

Chaos Dwarves Online - The best CD site on the net, complete with galleries, videos on how to convert your own CDs, a 'wiki' full to the brim with information and an active, friendly forum, with lots of members who are all happy to help with any CD related questions.
Unfortunatly this site is currently having technical difficulties

Hand of Hashut - Another large Chaos Dwarf forum, well worth a look.