Wouldn't it be possible to mount a remote file system in the finder using sshfs? Connections details are already there in both Core Shell and Core Tunnel. What's missing is Fuse but that could be bundled with the helper tool. With that it would be easier move files back and forth from the mac to the remote machine.
I am currently using fuse and sshfs controlled by bash scripts for this purpose, but having this integrated and synced in the cloud would be a cool feature, easy to use. I am in too in beta testing!