When these great projects showed up in my google reader feed the other day, I saved them to my Delicious links page right away!
First, I absolutely love Made By Lex's Cirrus Duvet Knockoff.
Don't worry, she even included an awesome tutorial!
Original from Anthropologie is on the left, and Lex's knockoff is on the right.
This Anthropologie tank top knockoff by Sarah at Welcome to the Good Life is also white and airy, and I absolutely love it. Anthro tank is on the left, and Sarah's amazing knockoff is on the right.