having music does not matter, as this method entirely ignores your media folders. Even a previous jailbreak does not matter, as this method just steamrolls over your existing jailbroken files and replaces them. For example you might find Installer.app updated or downgraded depending on the version you already have.
What really DOESmatter is if you effectively have a broken iPod. If you have the "300 mb problem" for exame, it would not fix that. If you have already accidentally messed up some system files post jailbreak by following guides incorrectly, this might just make things worse. There's no way for one to preddict the infinite number of configuration changes a user can wittingly or unwittingly make once they get even partially broken out of jail.
It's mentioned in the demo that I'm using a freshly restored machine merely because, like a good scientist ir engineer, i'm giving you exact data on how to exactly reproduce the series of events you're seeing. Same device + same state + same inputs = same results.
On the ssh issue, the problem is I have to generate 3 keys on a paltry cpu. The first connection is slow UNLESS you reboot (in which case the reboot time is lengthened for key generation, but its better than having clients timing you out over and over). I plan to fix this later by dropping support for SSH1, and generating the keys on the server instead of the device.