its allowed for sure but revenues is something that needs to discussed. What kind of cpms are webmasters getting here?? some informtion on this will be appreciated.
Yes, as long as the contents of your directory comply with the adsense tos, allthough I'm not sure about directories that link to adult oriented sites.
some one who has applied for an adsense account with a directory can answere that properly. anyone has an experience about rejection with directories please comment.