Having spent hundreds of dollars over the past year or so and having my phi shields sold on dipmicro.com, today I received a coupon from them!
SPRING10 - all orders above $10 get some shipping discount. Canada and USA get free "Standard" and USA orders get discounted "Priority" shipping (the more you spend, the bigger discount).
Coupon expires May 31, 2011
Apparently they told me to pass this around so here it is. $)