The sites listed below have been useful to me as a Chinchilla owner, and I hope you will find them helpfull too:
www.bunnybazaar.co.uk
This on-line pet shop sells feed and accessories for your small pets.
www.chillaquip.freeuk.com
This is a good place to go for all your cages and accessories.
www.chinchillas-unlimited.co.uk
This is a forum based web site, where you can discuss all Chinchilla related issues. It is a great site, where you can buy, sell or discuss things with other Chinchilla owners. Well worth joining!
www.chingus.freeserve.co.uk
A good web site for general information about Chinchillas.
www.johnhopewell.co.uk
A great place to find just the right cage.
www.natchinsoc.freeuk.com
The web site of the National Chinchilla Society.
www.silverfallchinchilla.com
An informative site about Chinchilla care, breeding and genetics.