It's from Inc #9, 2 posts down. Click below to see the original page. It was shopped/editted to promote the Batman Message Board which needs all the hype it can get currently. See below for traffic count.
AFAIK, Damian's death is still on a need to know basis. Batman didn't even tell Catwoman yet. It looks like Power Girl went off looking for him on her own and probably discovered the tombstone and relayed the info to Huntress. Alfred told Tim to tell the Titans but it doesn't look like he did yet.
Hopefully, the revelation is played out more in-story for all the other key figures in Batman's life outside his 'Family'.
I miss Dad and Dan.
Here's possible future banner source. Or anyone feel free to add more or incorporate into their own submissions.