Tendulkar should be dropped now. He has not done anything great. Maybe give Ponting another chance out there.
Think , If Tendulkar is to be dropped we need to replace him with an Indian player as only four foreign players could be played and the four players D Smith , K Pollard , M Johnson and Mallinga couldn't be dropped.So its better we don't make any changes to the batsmen as it is found successful playing them.