For Patterns and free projects I love Simplicity.com
http://www.simplicity.com/
Alley Cat Scratch
http://www.alleycatscratch.com
The Costumer's Guide
http://www.costumersguide.com/index.shtml
The Wardrobe Door
http://costumes.narniaweb.com/
Another great pattern site is McCall's website
http://www.mccall.com/
Arwen-Undomiel
Real Elvish
http://realelvish.125mb.com
www.freewebs.com/costumecloset