23andme has a $50 off coupon sale for three days. Here's the email I got from them:
Visiting family this summer? Are they part of 23andMe? Take advantage of our summer discount: $50 OFF each kit you purchase. This offer expires in 3 days (11:59PM PDT, Sunday August 12, 2012).
To use this code, visit our online store and add an order to your cart. Click "I have a discount code" and enter the code below.
$50 off Discount code: VMQ6KG