There are many sites on the web that share information finding good ones is the hard part.  Here is my list of great sites.

For more information of Budgies, their care and breed, plus a great place hang out and chat go to The Budgerigar Breeders Club Forum

A few more interesting site on budges created by folks from the forum

Wells Family Budgerigars

The Budgie House

Budgietalk

Feathers pets

It Takes Two

Helpful sites

The Master Budgerigar Breeder