The wbfs games are on a slow disk that can't support many people. I've finally fixed the NKit downloads so the wbfs bottleneck should clear up overnight. I'll be monitoring traffic to see which format people choose.
It would appear that WBFS files are no longer working in the fault. I am getting a 401 error with the message:
"Please wait for your download to finish before starting another.
If you're not downloading anything, please try again in a couple minutes."
Maybe something in the url query string isn't right? I am sure it's due to the NKIT addition.