The Wall Street Journal published a point-counterpoint article on cloud-hosted file sync/share solutions like Dropbox, Google Docs, and myriad others. They chose a title I wouldn't have used myself, but there you have it.
I took the pro side. You can read the whole article here.
My side of the argument is here:
Yes: Employees Are Doing What's Best for the Company
By Ted Schadler
Why do employees use cloud-based solutions like Dropbox, Box and SugarSync to sync and share files? As well over 100 million Dropbox customers have learned, it's because these services make it a cinch to move files from a computer to a tablet to a smartphone to another computer and back again. And it's a much better solution than email for sharing a bucket of files with others.
These services began life with a focus on home scenarios. But it didn't take savvy employees long to realize that these services also solve three big productivity problems at work: 1) getting all your work files on every device you use for work; 2) sharing files with colleagues; and 3) sharing files with trusted partners and customers.
So, should IT organizations allow employees to use these cloud-based services? That question is patently absurd. Why should an IT organization dictate what employees do to get their work done? Who made IT responsible for policing employee behavior and tools?