Add the $20 off $75 coupon and search for 391809 to find the Kingston 256MB DDR priced at $80 - $20 coupon - $24 rebate [Exp 1/4] = $36 with free shipping.
Mmm, must still be under maintenance. With this coupon I either get an error that it can't be processed or, after acceptance, I doesn't subtract the $20 (cleaning out cookies etc in between). I'll keep trying.