Hello Linux Geeksters. The Ubuntu 13.10 Saucy Salamander installation wizzard asks the user to enter his Ubuntu One username and password, in order to get the service automatically installed.
The new Ubuntu One users that don’t have an Ubuntu One account, can easily register, by thicking “I am a new Ubuntu One user”. 
For now, login in to Ubuntu One from the installation screen works well, but when choosing to register to Ubuntu One, the screen freezes, but Canonical should fix this until the official release of Ubuntu 13.10 Saucy Salamander.
Yes, but when choosing “Login later”, it is not working after installation. I hope, Canonical should fix this until the official release of Ubuntu 13.10 too.