The Perris Valley Line will open December 28th!
On Halloween, the first Metrolink trains to run on the newly-upgraded tracks did some testing near the new Hunter Park station. Passenger service is expected at the veeeerrrrryyy tail end of 2015 (but they did say "this year," so technically they're on time). The PE has the details.
And if you're near the tracks, be alert, as testing has begun.