Today i noticed that WordPress actually support automatic upgrade via SSH, the problem was that i simply did not get option up at all. After some quick googling, i noticed that i was missing a up2date ssh2 PECL package. So for me the fix was simple:
1) Installing php5-devel (PHP development libraries)
2) Installing the pecl package ssh2
3) Restarting Apache
And voila, the SSH2 option appeared!
Jøss, se der ja! Et lite easteregg
Selv om jeg egentlig synes det er greit med FTP, siden man begrenser filtilgangen litt. SSH-chroot er litt pes.