as posted sometimes ago ubuntu 12.10 is release but previously public download was not available but now its available for download you can download ubuntu 12.10 from official download page

Download page : http://www.ubuntu.com/download
All available download option : http://releases.ubuntu.com/quantal

Direct download link for ubuntu 12.10 32bit

Download torrent 64bit
Download torrent 32bit 

see more about ubuntu 12.10 and its new features