Thanx for pointing out your house rules PS. Sunday my DM had some Ettins weilding giant whips and they were making AoO with them. I figured this wasn't strictly correct but I didn't say anything because I agree the whip as it stands is a pretty useless weapon. (I'll take getting hit with a whip at 20' than a giant club at 10' any day! )
Actually they were making ranged grapple attackes with them too.... maybe I'll suggest your house rules to my group next session.