Frankly, in my experience, it's all about perceived security. That and the utility of setting permissions for third party access with read/modify logs. It's k

Frankly, in my experience, it's all about perceived security. That and the utility of setting permissions for third party access with read/modify logs. It's kind of like Merrill's data room, but web 2.0'y and faster/more user friendly. Dropbox was easier (I loved being able to right click a zip file sitting in my public folder), but our clients told us it was too risky to have a document sitting on an open live link without password/user access control. We're currently using sendthisfile.com, but I believe we're moving to box.com soon. We're a top end AmLaw 200 firm.