I think the DVLA are all taking a break as i waited 6 weeks for my V5. Then i rung them and they told me to fill in a V60 to reapply for the V5, its free if you have the green tear off strip, this can be used to get the tax as long as its less than 2 months old.
So i send off the form and 2 weeks later i get the V5 and all is happy. Then 2/3 weeks after that i get another V5 so now i have 2 identical ones.
It can take up to 6 weeks but i would grab the V60 from the post office and try and get a new one.
but as said before if you have the small green tear slip then you can use that to get the tax disk. Or keep phoning the dvla and get them to look into it for you.
buzz