Mine usually get approved in 24 hours.
Initially I used 2 adfly accounts. Since I never had more than 3/4 gigs in the queue at the same time, and because my gig length is several days, I delivered the first gig, then changed the campaign URL to that of the 2nd gig, while simultaneously doing the same with the third and fourth gigs on my other adfly account.
However, I now use the redirect method where I point the traffic at my domain, and my domain picks one of the URLs in my list to redirect to in rotation. If you do that, then you can just use one account.
Is there a script or something to achieve this?