According to Go/NoGo status meeting, Fedora 18 will be delayed once again and this time, it will be two weeks delays instead of the usual one week. Because of this delay, the final release of Fedora 18 will be on January 2013 instead in December 2012. This means, we won't be able to see Fedora 18 shipping this year.
The good point about this delay is that Fedora people can do more testing on preparing the Secure Boot mechanism which should be first implemented in Fedora. Let's just hope it goes well as planned or else people will be quite disappointed by Fedora's decision about it.