My son applied for his PIN this weekend too. He self selected the PIN, so he has the number. There was some disclaimer that it can't be used for certain things (signing loan docs?) until it is verified (1-3 business days). But, it is good immediately for the FAFSA. Since you applied on a Sunday, it has only been 2 business days so far. He hasn't received confirmation yet either.
Don't worry. FAFSA's don't start getting filed until mid to late January. You have more than enough time to apply for a PIN again if you have to.
2 years ago, it only took a few days to get the PIN by e-mail. Maybe there is a big rush for PINs at the begining of the year when the new FAFSA is available.