I'm not sure about an NTFS partition, but I use wiithon all of the time on my WBFS partition and it works great.
As far as SSH, what I get from your question is you either want to SSH into the laptop and then manage the hard drive. Or you want to SSH into the wii. SSH into the laptop is no problem I have 2 scripts on my laptop. One for when I am on my LAN and one when I connecting from WAN: ssh -X -l "user" -p "port" "ip address. Just make sure that you have X forwarding enabled in your /etc/sshd.conf and that your username is in the SUDOers file.
The latter seems possible as well. Just not with SSH. I'm pretty sure I remember seeing an FTP daemon for the wii. I'm not sure about the security of it(now that I think about it though I might install it and run a Nessus scan). I'm also not sure if you can just upload a game to your partition without some other program working its magic on the file.
Glad to see that there is another Linux user out there! Also, if all else fails you can always run windows in a virtual machine.