According to NFL.com this morning, "sources" close to Sherman claim he's telling friends he accidentally ingested adderall from a teammate's water bottle (the teammate has a script for it). Now, this screws him, since honestly, there is no intent in the PED policy, you're either dirty or clean. Sherman will probably be out.
Browner is claiming that the urinalysis process was messed up, claiming "he saw the person dump urine from one container into another". This is common, but if one of the containers isn't clean, then he has a case. I don't know anything about Adderall, but if it stays in your system for a while, and Browner is claiming there is a flawed process, then I can't see how the league would let him retest immediately. If he comes up clean, then he's good.
So there is some good news brewing I hope. Honestly, Sherm is a smart guy, and as confident as he's been on twitter, I figured for sure that he was innocent, knowing you really can't beat these drug tests, or come up with a plausible excuse if you're dirty. There have been players buying stuff over the counter that have been suspended, and that's perfectly legal. Taking prescription medication without said prescription is technically illegal, depending on the substance.
I'm hoping at least Browner is exonerated. After all, no system is perfect and people make mistakes, so I can honestly see some cases where the player really doesn't know how he is dirty, and it's a mistake.