Just to clarify, there are two different things going on at the moment, one being the 50% sale on shippable items in honor of our coming office move and then there is a 10%  off $10.00 or more coupon as well.  The sale on the shippables isnt' a coupon but a 50% off sale.
If you are using the coupon then the standard restrictions do apply which is noted on the Front page article and in the coupon that went out via email.
Those restrictions for the coupon are below.  Hope this helps clarify:)

*Not valid toward the purchase of Magazines, some shippable items, Tutorials, Gift Certificates and Software
Coupon valid at the time of checkout only.