http://marekblotny.com/2010/08/does-daily-scrum-has-to-have-so-rigid-structure/

I see daily stand-up meetings ("daily scrums") as a one of the most beneficial practices in SCRUM repertory. Theory says that during the daily scrum each team member should answer three well-known questions.

What I find strange is that theory doesn't leave much room for any discussion during the daily scrums. Discussions should take place during the follow-up meetings, immediately after the daily scrum. In general I agree with this rule. Bigger issues which don't require entire team can be talked through later.

But I think it's much more beneficial for a team if all members are allowed to jump in anytime during the daily scrum to add anything they find helpful ...