On Twitter I came across Tweak the Tweet which goes into some detail about how to manage the information, sort it, etc. What Kate Starbird has put together seems to have merit and "might" be the way to go. Being the novice I am I can't discern if "this is it" or not.
What I do like is that a road map is given for how it can be done and the challenges of getting the community to pull together in the same direction is explained when setting up the hash tags.
This is one of the reasons I am convinced that having a regional approach that I previously wrote about in Disaster Wiki which if is established in advance of a disaster can help immeasurably with these types of efforts. You could pre-establish the protocols before you are scrambling during a response and work to get everyone on the same sheet of music.
