Reports are rolling in on today's Supernatural panel. Alice and Nightsky are at Comic Con and will file their full reports as soon as they get a chance, until then, what other outlets have reported are below the cut.
Supernatural Bids an Emotional Farewell at San Diego Comic-Con
Supernatural stars earn standing ovation after emotional final Comic-Con panel
Supernatural loves the fans right back at emotional farewell Comic-Con panel
FINAL SEASON: SUPERNATURAL’s Tribute to Baby & SPN Family at San Diego Comic-Con
One very lucky fan got a great surprise!
Here's the video on restoring Baby.
Videos of the emotional thanks yous and goodbyes, recorded by Alice and Nightsky:

 Update #2
Update #3
 Update #4
'Supernatural' star Jared Padalecki gets surprised with his own fan moment
Why Misha Collins Doesn’t Think Supernatural Would Have Gotten On The Air Today  
Behind the Scenes With the 'Supernatural' Guys at Their Last Comic-Con (PHOTOS)
Then, of course, don't miss emotional reflections on the past and hints to Supernatural's future contained in Alice's and Nightsky's 16 Press Room Video Interviews with the Supernatural Cast and Executive Producers! 
 We will update this article as more becomes available!