Today the tag "setlock" came up on Twitter. I'm sure it's on tumblr too.
This post explains it: #Setlock, or How We Can Survive as a Fandom For The Next Few Months. Also refer to the Baker Street Babes on spoilers, I pray you.
Here's Benedict's message to fandom as well. This link is just the image, in case you'd like to repost it.
If you have a policy on spoilers, do tell others. Me, I don't want to be spoiled. They've built the set, they're filming Sherlock. That makes me happy. I want it all to go smashingly well.
I won't kill anyone or yell for being spoiled, mind you.
But I want to not know anything. I want to be surprised and have my first viewing of season 3 without knowing anything -- for it to be fresh. Just as I was for my first viewings of season 1 and 2.
Thanks!! Do please pass the information along, will you? Also... Happy second week of filming, my dears!
ETA 29-July-2013: I ended up getting sucked into setlock pics soon after writing this originally; but I do tag them here, and mask spoilers.