Cramer thinks Dendreon (DNDN) may not be dead in the water because of all the acquisition activity and says he'll keep an eye on the company. Cramer says he'll wait a little longer before jumping into shares of Salesforce.com (CRM). He says the price needs to come down a little before he starts buying. Cramer says there should be a three-way combination that could dominate local search. Cramer says he would love to see Open Table and Grub Hub combine with Yelp (YELP) to own the space, but for now is waiting for Yelp to get a little cheaper before he considers buying shares. Jim Cramer answers Twitter questions every Monday, so send your questions to #CramerQ.