Ok, this is a spoiler on the production and what Season 3 will contain.
Even if you've read the books, but don't want to know exactly what events happen in Season 3 (ie don't get bumped to Season 4), do not read.
If you have not read the books, DO NOT READ.
You've been warned.
According to WinterIsComing, the Red Wedding WILL be in Season 3, and they are taking an entire 2 weeks to film the thing.
And...it appears from a set picture that Jaime has a body part not long for this world, so they won't change that. LINK
If old news, sorry.