I've long dreamt of an occasion where hundreds or thousands of mathematicians work on a single problem in a truly coordinated way. Well, now that I'm nearing my doctoral defense in mathematics, I've decided to consider making this dream a reality.
But I can't do it alone....
What are some of your thoughts on how best to implement such a scheme? What are some practical pitfalls preventing such an effort taking place? How could an organizing body avoid them? Would it be feasible to try a test run on Math.SE of some coordinated work, perhaps a simple but unsolved problem in an area of mathematics with various connections to subject areas? What would be the most appropriate level so that most could contribute?
Maybe this response will seem oblique bordering on irrelevant, but...Your question reminds me of the classic Sandman story Dream of A Thousand Cats. In it, a cat learns that reality could be completely restructured (or rather, re-restructured...) if only (any) one thousand cats would simultaneously believe and dream in unison of a different reality. When asked what he thinks of this, one of the characters -- a cat -- says "I would like to see anyone -- prophet, king or god -- persuade a thousand cats to do anything at the same time."
I feel like herding mathematicians is only a little easier than herding cats. What grand project would convince a thousand of us to get involved in a coordinated way?