DMOZ has gambling guidelines that are more important for gambling sites to be aware of than the general guidelines:
http://dmoz.org/guidelines/gambling/
Also, almost every category has category descriptions that explain what sites go there and don’t go there. Original content is the thing that is repeated over and over. Most gambling sites on the Internet are filled with copied material, so they can’t be listed. Normally only ones that have quality original content, like this site, get listed.
Randy, hopefully you applied to a very small category. People often seem to apply to large categories that could use work, but that isn’t the way to go. Start very small.
DMOZ is still the center of the Internet, whether that is good or bad, and it is a great place for finding quality original content gambling sites.
Also, only fools would offer a bribe.