As mentioned in another thread, there is now an $8 rebate to go along with this sale. This brings the price down after rebate to $16 per 10 pack or $1.6 per disk. This is the lowest advertised price I've seen and is hopefully a sign of things to come.
Personally I hate rebates but for those who don't mind the hassle, this is the best deal around. Be aware that newegg will pull back the free shipping offer at any time.