Do many folks here use Dropbox for large(r) scale collaboration (i.e. 100 or 10,000 users)?
I find folders work okay for myself and maybe up to 5 people but as the number of documents and collaborators goes higher than that it seems like it'd be really frustrating.
Unless the "search" is significantly better for business users.
I use it for an org with anywhere between 25 and 50 using it at any one time, assuming that you spend a bit of time organizing the folder structure at the beginning it's not a major issue but it does require staff discipline to keep it organized. It doesn't beat a dedicated Document Management system but it strikes a nice balance for working on frequently updated files.
I wonder what percentage of those officially allow their employees to use it though. A lot lower I bet.