Spideroak is pretty cool. I just tried it out based on your recommendation. Some thoughts:
- Setting up synchronized folders is more of a hassle than it should be
- It only scans once every hour. That's a pretty big window to lose data!
- It can't scan any faster than every 5 minutes.
- The UI is graphically heavy and feels slow (especially the tray menu)
Other than that, no complaints. It's definitely better than Dropbox. Guess I'll try ifolder next.