I thought the shirt I posted here: jcrew-head-to-toe had been posted on the jcrew.com site but it must have previewed early at JCrew's Garden State Plaza store. It just got rolled out in JCrew's new arrivals:
buy it here
I love it to death! I know some women love cotton t-shirts under their blazers but I prefer something dressier. A silk tee fits the bill perfectly. I wear it with my pink JCrew pants or navy blue pants tucked in.