As to what you can discuss: Any of the items in the discovery release.
What is not up for discussion: Things that have not been included yet, such as Trayvon Martin's tweets, and supposition about the red liquid in the cup being linked to illegal activity.
I suspect O'Mara will have hired a company by now to authenticate Trayvon's tweets (since he's unlikely to get them in time, if at all, from Twitter or FB despite his subpoena) and will disclose which he intends to introduce. When and if he does so, the tweets can be discussed.
Please try to keep the discussion to how the released material is relevant to the court case -- rather than using it just to attack Trayvon.
Thanks to CBoldt for recapping O'Mara's statements. You can all take a cue from what O'Mara said.
I think discrepancies between what witnesses told police and the new discovery is also relevant. For example, that Tracy said he drove Travyon halfway to Sanford where Brandy picked him up and it appears from the text messages he took a bus ride.
Also I've deleted some comments referring to people with different opinions as "fools." This is about the discovery not what people at other websites think.
Any questions, feel free to PM me or ask.
My take on the discovery is here