Go for it. But I would recommend a full conference call (non time limited). (If he's willing). As opposed to individual investors phoning. I've seen many conference calls with a 30 min window for investors to ask questions. Time for answers to many questions.
Just my opinion.
And don't forget. The poison pill agreement also protects BB. If investors want to get rid of him as CEO... it will cost you (the company) $$$$$$$.