Spideroak does. Their GUI is really awful, but the commandline python script seems to work well.
SpiderOak claims to.
Wuala.com does aswell (not mentioned in parent). They are a Swiss company and don't have a lot of traction in the US.
Why are you trusting any of them to do that anyway. Ecryptfs is your friend.
There is no Google Drive linux client yet =/. What about the others? I use Dropbox on Windows, Linux, Mac, Android and I have even used it on a personal server. I have not seen anything that can replace it.