1) In general, it’s a solid brief. It’s going to be extremely unpopular in the IANAL computer nerd world, obviously, but it’s mostly pretty solid on the law.
2) DOJ brings up some provocative facts not found in the Lavabit brief that are not going to help Lavabit before the Fourth Circuit judges.
Read more on The Volokh Conspiracy, while I ponder whether Orin includes me in the “IANAL computer nerd” reference. 🙂