The source of that program is here.
In order to play with this stuff, you will have to download the compiler source and build it. I assume you can do that, if not, drop me a line.
I've spent a total of about 40 hours on Go over the last week, and I can say that I believe this is all quite correct:
The Go programming language is an open source project to make programmers more productive. Go is expressive, concise, clean, and efficient. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel type system enables flexible and modular program construction. Go compiles quickly to machine code yet has the convenience of garbage collection and the power of run-time reflection. It’s a fast, statically typed, compiled language that feels like a dynamically typed, interpreted language.
The more I explore, the better I like it. Go does "feel like a dynamically typed, interpreted language." Exactly. And using TextMate I can just do CMD-R and the build, linking and execution happen painlessly.
I wrote about 30 or so short programs to explore simple tasks in Go. I also wrote two different versions of the PSSM code discussed here, and in subsequent posts. And I played with Bruce Eckel's code from here. A zipped folder of all this stuff is on Dropbox. It's not very well documented but only the intrepid will follow this lead anyway.
I'm hooked. I have a lot of work to do figuring out the interface and concurrency stuff. And it is great fun!