The Yahoo directory can take months to be listed if at all (assuming you are going the free route). For $299 a year they will list you in 7 days ($600 for adult sites, it’s not clear if gambling=adult to them).
Yahoo has actual people reviewing every site submitted and they don’t look so kindly on gambling related sites. My understanding is that they won’t even take a new gambling site in the directory, but I could be wrong about that.
Anyone else have any luck with Yahoo’s Directory?