Old Navy 30% Off Entire Store, June 24-29

From their Facebook page:
6 days only! Take 30% off everything in the whole store. Yes…everything. Wholey moley, what are we thinking? Promotional prices valid 6/24/2010 through 6/29/2010.Online and in-store, US only. Excludes GiftCards

There is mixed feedback on if you can stack an additional coupon with this sale.  Some people have been able to in the past, and others say they weren't allowed.  I would for sure try it!