I use GOPATH only inside of a wrapper script that sets GOPATH to the directory for the current project. All libraries are stored alongside my project code in source control. I use go get when adding/changing libraries, but remove the .git folder when doing so.
In the recent past, even with a premier paid account on GAE, getting a specific quota raised took a few days and was apparently a non-trivial operation.
Yeah, what's amazing is that they didn't charge us to increase the limit. It's also pretty awesome that their android push notification service has no quota and is free.
Sketch is on it's way to being what Illustrator should be. It's still a little buggy at times, for instance, you can't export things at high resolution and the workaround, resizing a group of objects, rarely works correctly.
In the go driver, it does basically what the Javascript one does and just takes an Expression object, with methods like .Add(<Expression>) and .Mul(<Expression>) that also return Expressions
It seems that (P)NaCl could be pretty close if you can, for browsers without it (same as not having asm.js), compile the LLVM bitcode into Javascript, which I think is possible with Emscripten (also what compiles to asm.js).
You would probably want some sort of layer to abstract away the NaCl API so you can call the equivalents for asm.js, but I don't actually know that asm.js has equivalents.
As I recall he did portray it as risky. I remember him saying something along the lines of them having the Wired Magazine covers on a wall from all the previous huge startups that failed miserably, to remind them to be humble. I guess it wasn't that effective.