Here are some of my most used links.

Patterns

Quilter's Cache

This is run by Marcia, who has done a phenomenal job.  She has outgrown several servers, and keeps putting up more and more blocks.  She provided me with all of the instructions and help I needed when I started this addictive hobby.

Block Central

A fabulous and comprehensive list of block sites across the internet.

Shops
(No affiliations, just a very happy customer!)

Big Horn Quilts

My personal favourite.  Lots of fabric, updated frequently and they can squash 10 yards of fabric into  a flat rate Global Priority envelope (which usually takes a week or less to arrive Down Under).

eQuilter

These guys also have really yummy stuff, but their pages take my ol' computer quite a while to download.

Craft Connection

The shop that ruthlessly sucked me into the world of buying fabric online.  They can fit anything under US$50 into a Global Priority bag (about 7 1/2 yards).

Guilds

North of the Yarra Quilters

This is my local guild.

Southern Cross Quilters

An online group, run for and by Australians, New Zealanders and ex-pats.

Friends' Sites

Michelle's Photo Gallery

Michelle's quilting gallery.  She also has photos of her amazing gardening!!