It seems to me that Internet drives are everywhere.
For a while we had DropBox as undisputed king of remotely synchronized files. When it prove successful, we got bunch of others, among which SugarSync seemed like most serious contender.
This week things got interesting with Microsoft introducing SkyDrive. And today we got Google onboard with Google Drive.
Only company missing action is Amazon. Yes, they have their drive also but they are missing half-decent sync client.
With so many heavyweight players around, things are bound to get interesting soon. :)