I have been searching out other Sims3 sites earlier and Evanell's site had a post about a free dress at the Sims3 store that was posted on 02/17/2010 in Evenell's news section.  Strange thing is that without clicking the link to the store I was unable to find it on my own.  It doesn't appear to be anywhere in the store when going though each and every category and age for females.  Don't know how long this link will work but I wanted to share with everyone. 

http://www.evanellsims.com/News.html

and

http://store.thesims3.com/productDetail.html?productId=OFB-SIM3:19578&startAt=0&back

I hope these links work.

Update.........Well that reason why I couldn't find it in the store is because it's located in the in game store thingy.  And thanks to Peachy for letting me know that the link works!